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 A214155 #20 Jun 24 2013 21:06:24 %S A214155 287327040,294053760,1149308160,2585943360,4597232640,7183176000, %T A214155 10343773440,14079024960,18388930560,23273490240,28732704000, %U A214155 34766571840,41375093760,48558269760,64648584000,73555722240,83037514560,93093960960,103725061440 %N A214155 Numbers n such that there are five distinct triples (k, k+n, k+2n) of squares. %e A214155 The following 5 triples all have a common difference of 287327040: %e A214155 (4342^2, 17498^2, 24362^2), (12454^2, 21034^2, 27014^2), (23266^2, 28786^2, 33406^2), (51778^2, 54482^2, 57058^2), and (57073^2, 59537^2, 61903^2). %Y A214155 Cf. A198387, A222154, A222155. %K A214155 nonn %O A214155 1,1 %A A214155 _Zdenek Cervenka_, Feb 16 2013