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 A195633 #5 Mar 30 2012 18:57:48 %S A195633 5,221,4265,47065,249197,256429,82680629,4143028753,2698130885, %T A195633 18995900417,195163601089,581539439365,1924737382669,6155051150201285, %U A195633 25057502411145377,378391033557627665,1057252484775138401,24775866907947863945 %N A195633 Hypotenuses of primitive Pythagorean triples in A195631 and A195632. %C A195633 See A195500 for discussion and list of related sequences; see A195632 for Mathematica program. %Y A195633 Cf. A195500, A195631, A195632. %K A195633 nonn %O A195633 1,1 %A A195633 _Clark Kimberling_, Sep 22 2011