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 A226954 #16 Sep 07 2013 09:46:41 %S A226954 12671122464000,50684489856000,114040102176000,202737959424000, %T A226954 316778061600000,456160408704000,620885000736000,810951837696000, %U A226954 1026360919584000,1267112246400000,1533205818144000 %N A226954 Numbers n such that there are seven distinct triples (k, k+n, k+2n) of squares. %C A226954 For the first 11 terms we have a(n) = n^2 * a(1). Are there any other primitive terms other than a(1)? %e A226954 These 7 triples of squares have a common difference of 12671122464000: (676403^2, 3623347^2, 5079347^2), (911820^2, 3674580^2, 5116020^2), (2615340^2, 4417140^2, 5672940^2), (4885860^2, 6045060^2, 7015260^2), (5664815^2, 6690385^2, 7578415^2), (10873380^2, 11441220^2, 11982180^2) and (11985330^2, 12502770^2, 12999630^2). %Y A226954 Cf. A198387, A222154, A222155, A214155, A226858. %K A226954 nonn %O A226954 1,1 %A A226954 _Zdenek Cervenka_, Jun 26 2013