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 A093508 #5 Mar 31 2012 10:26:02 %S A093508 6,15,20,28,35,42,45,63,66,72,77,88,99,91,104,117,110,130,120,143,165, %T A093508 156,153,170,187,204,195,190,221,209,228,210,238,247,266,231,255,273, %U A093508 285,304,276,299,322,336,345,323,357,368,325,350,342,391,400,414,425 %N A093508 Semiperimeter of primitive Pythagorean triangles sorted on hypotenuse A020882(n). %C A093508 For ordered semiperimeter of primitive Pythagorean triangles see A020886. %F A093508 a(n)=A093507/2. %K A093508 nonn %O A093508 1,1 %A A093508 _Lekraj Beedassy_, May 14 2004