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 A195579 #5 Mar 30 2012 18:57:48 %S A195579 1,5,65,349,1189,3709,4549,24425,318365,1709401,5823721,18166681, %T A195579 22281001,119633645,1559351705,8372645749,28524584269,88980399829, %U A195579 109132338349,585965568785,7637704332725,41009217169201,139713407925841 %N A195579 Hypotenuses of primitive Pythagorean triples in A195577 and A195578. %C A195579 See A195500 for discussion and list of related sequences; see A195577 for Mathematica program. %Y A195579 Cf. A195500, A195577, A195578. %K A195579 nonn %O A195579 1,2 %A A195579 _Clark Kimberling_, Sep 21 2011