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 A195555 #9 Jun 04 2015 14:30:12 %S A195555 13,701,18901,254813,13741001,370497401,4994844413,269351100901, %T A195555 7262490035501,97908939928813,5279820266120401,142359329305393201, %U A195555 1919211035489748013,103495036587140999501,2790527565781827490501,37620374619761100622013 %N A195555 Hypotenuses of primitive Pythagorean triples in A195553 and A195554. %C A195555 See A195500 for discussion and list of related sequences; see A195553 for Mathematica program. %F A195555 Empirical g.f.: -x*(x^5+x^4+13*x^3-18901*x^2-701*x-13)/(x^6-19602*x^3+1). - _Colin Barker_, Jun 04 2015 %Y A195555 Cf. A195500, A195553, A195554. %K A195555 nonn %O A195555 1,1 %A A195555 _Clark Kimberling_, Sep 21 2011