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 A126611 #3 Mar 31 2012 10:26:06
%S A126611 3,5,5,7,7,7,9,9,9,11,11,11,11,11,13,13,13,13,13,13,15,15,15,15,17,17,
%T A126611 17,17,17,17,17,17,19,19,19,19,19,19,19,19,19,21,21,21,21,21,21,23,23,
%U A126611 23,23,23,23,23,23,23,23,23,25,25,25,25,25,25,25,25,25,25,27,27,27,27
%N A126611 Sum x+y of generator pairs (x, y) {x and y coprime and not both odd} of primitive Pythagorean triangles, sorted.
%C A126611 Also, the square root of the sum of even leg and hypotenuse of primitive Pythagorean triangles, sorted.
%F A126611 2n-1 appears A072451(n) times.
%Y A126611 Cf. A094192, A094193.
%K A126611 nonn
%O A126611 1,1
%A A126611 _Lekraj Beedassy_, Feb 07 2007