This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A236331 #9 Jan 09 2015 08:01:53 %S A236331 64,256,320,576,704,1024,1216,1280,1600,1856,1984,2304,2624,2816,2880, %T A236331 3136,3520,3776,3904,4096,4544,4864,5056,5120,5184,5696,6080,6336, %U A236331 6400,6464,6976,7424,7744,7936,8000,8384,8896,9216,9280,9536,9664,9920,10496,10816 %N A236331 Positive integers n such that x^2 - 18xy + y^2 + n = 0 has integer solutions. %e A236331 64 is in the sequence because x^2 - 18xy + y^2 + 64 = 0 has integer solutions, for example (x, y) = (1, 13). %Y A236331 Cf. A001519 (n = 64), A052995 (n = 256), A055819 (n = 256), A005248 (n = 320), A237132 (n = 704), A237133 (n = 1216). %Y A236331 Cf. A031363, A084917, A237351, A237599, A237606, A237609, A237610, A236330. %K A236331 nonn %O A236331 1,1 %A A236331 _Colin Barker_, Feb 16 2014