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 A222155 #11 Jun 24 2013 21:09:38 %S A222155 1367520,5470080,12307680,21880320,32672640,34188000,49230720, %T A222155 58544640,67008480,71831760,73513440,87521280,110769120,130690560, %U A222155 136752000,165469920,196922880,209969760,221205600,231110880,234178560,268033920,287327040,294053760,307692000 %N A222155 Numbers n such that there are four distinct triples (k, k+n, k+2n) of squares. %e A222155 The following 4 triples have a common difference of 1367520: (802^2, 1418^2, 1838^2), (2162^2, 2458^2, 2722^2), (2729^2, 2969^2, 3191^2), and (6049^2, 6161^2, 6271^2). %Y A222155 Cf. A198387, A222154. %K A222155 nonn %O A222155 1,1 %A A222155 _Zdenek Cervenka_, Feb 10 2013