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Topic: Decagonal number

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	Centered decagonal number - Wikipedia, the free encyclopedia
		A centered decagonal number is a centered figurate number that represents a decagon with a dot in the center and all other dots surrounding the center dot in successive decagonal layers.
		Therefore, all centered decagonal numbers are odd and in base 10 always end in 1.
		A centered decagonal prime is a centered decagonal number that is prime.
	en.wikipedia.org /wiki/Centered_decagonal_number (220 words)

	Decagonal number: Facts and details from Encyclopedia Topic (Site not responding. Last check: 2007-10-10)
		1 (one) is a number, numeral, and glyph....
		A nonagonal number or enneagonal number is a figurate number that represents a nonagon....
		A pentatope number is a number in the fifth cell of any row of pascals triangle starting with the 5-term row 1 4 6 4 1 either from left to right or from right...
	www.absoluteastronomy.com /encyclopedia/d/de/decagonal_number.htm (606 words)

	Decagonal number: Facts and details from Encyclopedia Topic (Site not responding. Last check: 2007-10-10)
		Star number A star number, or centered 12-gonal number, is a centered figurate number that represents a centered hexagram, such as the one that chinese checkers are played on....
		Nonagonal number A nonagonal number or enneagonal number is a figurate number that represents a nonagon....
		Pentatope number A pentatope number is a number in the fifth cell of any row of pascals triangle starting with the 5-term row 1 4 6 4 1 either from left to right or from right to left....
	www.absoluteastronomy.com /d/decagonal_number (538 words)

	Decagonal number - Wikipedia, the free encyclopedia
		A decagonal number is a figurate number that represents a decagon.
		The decagonal number for n is given by the formula 4n
		The decagonal number for n can also be calculated by adding the square of n to thrice the nth heteromecic number, or to put it algebraically, D
	en.wikipedia.org /wiki/Decagonal_number (135 words)

	Everything about 1969 (number) (Site not responding. Last check: 2007-10-10)
		Natural numbers have two main purposes: they can be used for counting ("there are 3 apples on the table"), and they can be used for ordering ("this is the 3rd largest city in the country").
		Two generalizations of natural numbers arise from the two uses: ordinal numbers are used to describe the position of an element in a ordered sequence and cardinal numbers are used to specify the size of a given set.
		In some sports, one is the number of a specific position: in rugby union, the number of the loosehead prop; in baseball, the number representing the pitcher's position; in football, the number of the goalkeeper.
	ary.digital.en.wikimiki.org /en/1969+(number) (10537 words)

	4000 (number) - Article and Reference from OnPedia.com (Site not responding. Last check: 2007-10-10)
		Four thousand (4000) is the natural number following 3999 and preceding 4001.
		4503 - largest number not the sum of four or fewer squares of composites
		4960 - tetrahedral number; greater of 4th pair of Smith brothers
	www.onpedia.com /encyclopedia/4000-(number) (235 words)

	2000 (number) - Wikipedia, the free encyclopedia
		2000 (two thousand) is the natural number following 1999 and preceding 2001.
		Two thousand is the highest number expressible using only two unmodified characters in roman numerals (MM).
		In Star Trek, the registry number of the USS Excelsior, NX-2000 in Star Trek III: The Search for Spock, and NCC-2000 commanded by Hikaru Sulu in Star Trek VI: The Undiscovered Country.
	en.wikipedia.org /wiki/2000_(number) (447 words)

	Top Ten Business Schools (Site not responding. Last check: 2007-10-10)
		Ten is a composite number, its proper divisors being 1, 2 and 5.
		A polygon with ten sides is a decagon,and 10 is a decagonal number.
		Ten is a Harshad number and a semi-meandric number.
	www.relativeaccess.com /File/29060-Top.Ten.Business.Schools.Html (1069 words)

	Everything about 5000 (Site not responding. Last check: 2007-10-10)
		Amicable numbers are two numbers so related that the sum of the proper divisors of the one is equal to the other, unity being considered as a proper divisor but not the number itself.
		Such a pair is (220, 284); for the proper divisors of 220 are 1, 2, 4, 5, 10, 11, 20, 22, 44, 55 and 110, of which the sum is 284; and the proper divisors of 284 are 1, 2, 4, 71, and 142, of which the sum is 220.
		A centered octagonal number is a centered figurate number that represents an octagon with a dot in the center and all other dots surrounding the center dot in successive octagonal layers.
	68.zh.wikimiki.org /en/5000 (11984 words)

	LINCOLNSHIRE - LoveToKnow Article on LINCOLNSHIRE (Site not responding. Last check: 2007-10-10)
		Large flocks of geese were formerly kept in the Fens, but their number has been diminished since the drainage of these parts.
		Where a large number of them were bred, nests were constructed for them one above another; they were daily taken down by the gooseherd, driven to the water, and then reinstated in their nests, without a single bird being misplaced.
		There remain a fragment of the south wing of the transept, two sides of the decagonal chapter-house (1282) and the beautiful west gate-house, Early Perpendicular (I332I388), with an oriel window on the east.
	www.1911ency.org /L/LI/LINCOLNSHIRE.htm (4540 words)

	1000 (number)
		1225 - triangular number, 35^2, triangular square number, hexagonal number
		1540 - triangular number, hexagonal number, decagonal number, tetrahedral number
		1681 - 41^2, smallest number yielded by the formula n^2 + n + 41 that is not a prime
	www.askfactmaster.com /1_E3 (609 words)

	Home - 1000 (number) (Site not responding. Last check: 2007-10-10)
		It is important to distinguish the number zero (as in the "zero brothers" example above) from the numeral or digit zero, used in numeral systems where the position of a digit signifies its value.
		In a zero-based indexing scheme, the first element is "element number zero"; likewise, the twelfth element is "element number eleven".
		In some signed number representations (but not the two's complement representation predominant today) and most floating point number representations, zero has two distinct representations, one grouping it with the positive numbers and one with the negatives; this latter representation is known as negative zero.
	categora.eslovaquia.es.infoax.org /en/1000+(number) (10712 words)

	iqexpand.com (Site not responding. Last check: 2007-10-10)
		1681 - 41^2, smallest number yielded by the formula n^2 + n + 41 that is not a prime, centered octagonal number
		1791 - largest natural number that cannot be expressed as a sum of at most four hexagonal numbers.
		1001-1249 1001 - sphenic number, pentagonal number, pentatope number 1002 - sphenic number,...
	one_thousand.iqexpand.com (900 words)

	5000 (number) - QuickSeek Encyclopedia (Site not responding. Last check: 2007-10-10)
		Five thousand (5000) is the natural number following 4999 and preceding 5001.
		5188 - φ(5189) = 2592, centered heptagonal number
		5777 - smallest counterexample to the conjecture that all odd numbers are of the form $p + 2a^2$
	5000number.quickseek.com (118 words)

	RAVENNA - Online Information article about RAVENNA
		It is circular internally and decagonal externally, in two storeys, built of marble blocks, and surmounted by an enormous monolith, brought from the quarries of See also:
		There are a number of fine carved sarcophagi in the church (5th to 8th century).
		The building activity of the Gothic kings was continued by Justinian, to whose time we owe the completion of S. Vitale and S. Apollinare in Classe, and some of the mosaics in S. Appollinare Nuovo.
	encyclopedia.jrank.org /PYR_RAY/RAVENNA.html (6084 words)

	Middle East Open Encyclopedia: Decagonal number (Site not responding. Last check: 2007-10-10)
		This is an extract from The Middle East Open Encyclopedia, made possible through the Wikimedia Foundation.
		Iraq Museum International always displays the most recent published revision of the source article, Decagonal number; all previous versions may be viewed here.
		They link directly to authoring tools for you to start writing a particular article.
	www.baghdadmuseum.org /ref?title=Decagonal_number (257 words)

	Table of Polytope Numbers, Sorted, Through 1,000,000
		It is also the first of an infinite number of multidimensional Polytope Numbers such as the Pentatope (4-Simplex or Hypertetrahedron), Hyperoctahedron, 24-cell, Hyperdodecahedron, and Hypericosahedron -- these Polytope numbers are the subject of recent papers by this author, see References.
		the 1681st Triangular number is also a Square S(41) (see Sloan A001110); and both the initial pair of digits (16) and the final pair of digits (81) are squares.
		Hendecagonal Number, or 11-gonal number, Hen(26); also the Heptagonal Number Hep(36), note that the two digits of the index (36) are also the first and last digit of the Heptagonal Number (base 10)
	www.magicdragon.com /poly.html (9059 words)

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