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 A094183 #6 Mar 31 2012 10:26:03 %S A094183 6,15,20,28,45,35,42,66,72,91,63,120,77,110,153,88,99,104,190,156,231, %T A094183 117,143,130,210,276,170,325,272,195,165,378,209,187,342,435,255,204, %U A094183 496,238,221,228,420,299,561,323,247,506,630,273,350,304,266,285,703 %N A094183 Semiperimeter of primitive Pythagorean triangles, sorted on area A024406(n), then on semiperimeter. %K A094183 nonn %O A094183 1,1 %A A094183 _Lekraj Beedassy_, May 06 2004 %E A094183 Corrected and extended by _Ray Chandler_, Jun 19 2004