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13 (number) - Wikipedia, the free encyclopedia |
 | | As it is an odd-indexed Fibonacci number, it is a Markov number, appearing in solutions to the Markov Diophantine equation: (1, 5, 13), (1, 13, 34), (5, 13, 194),... |
 | | The number is also considered unlucky by some as it is the sum of 1-4-5-3, the year of the fall of Constantinople to the Turks, marking the end of the Byzantine Empire. |
 | | Besides being the number of people sitting at the Last Supper, it's also the number of Gods (there were 12) at a banquet that was crashed by the evil spirit Loki (making 13) who killed one of the guests with a poison arrow. |
| en.wikipedia.org /wiki/13_(number) (1754 words) |
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