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| | Squares in Arithmetic Progression (mod p) (Site not responding. Last check: 2007-11-07) |
 | | This is to be expected, because our Legendre symbols are unavoidable for ALL primes, so the only reason we do not have non-trivial progressions for p = 2, 3, 5, 7, or 11 is that in these cases the applicable common difference equals the prime itself. |
 | | Our objective is to minimize the total number of Legendre symbols, and to include cases that involve both signs of these symbols, in order to maximize the coverage. |
 | | The task is to find conditions, probably involving one or two more Legendre symbols, and progressions with step sizes of 13, 19, 29, 31, and 37 to complete the unavoidable set. |
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