A236331 Positive integers n such that x^2 - 18xy + y^2 + n = 0 has integer solutions.

64, 256, 320, 576, 704, 1024, 1216, 1280, 1600, 1856, 1984, 2304, 2624, 2816, 2880, 3136, 3520, 3776, 3904, 4096, 4544, 4864, 5056, 5120, 5184, 5696, 6080, 6336, 6400, 6464, 6976, 7424, 7744, 7936, 8000, 8384, 8896, 9216, 9280, 9536, 9664, 9920, 10496, 10816

Offset

1,1

Links

Table of n, a(n) for n=1..44.

Example

64 is in the sequence because x^2 - 18xy + y^2 + 64 = 0 has integer solutions, for example (x, y) = (1, 13).

Crossrefs

Cf. A001519 (n = 64), A052995 (n = 256), A055819 (n = 256), A005248 (n = 320), A237132 (n = 704), A237133 (n = 1216).

Cf. A031363, A084917, A237351, A237599, A237606, A237609, A237610, A236330.

Sequence in context: A197905 A223315 A263924 * A321070 A017066 A141478

Adjacent sequences: A236328 A236329 A236330 * A236332 A236333 A236334

Keyword

nonn

Author

Colin Barker, Feb 16 2014

Status

approved