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 A195543 #5 Mar 30 2012 18:57:48 %S A195543 13,37,125,149,809,2749,299737,386425,11999605,234651157,408736241, %T A195543 6774999061,64022229925,1908639461677,1335895366969,9096838161305, %U A195543 21628618328809,143957700194557,11333535286711093,377268327596543125 %N A195543 Hypotenuses of primitive Pythagorean triples in A195541 and A195542. %C A195543 See A195500 for discussion and list of related sequences; see A195541 for Mathematica program. %Y A195543 Cf. A195500, A195541, A195542. %K A195543 nonn %O A195543 1,1 %A A195543 _Clark Kimberling_, Sep 20 2011