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 A106504 #6 Mar 31 2012 10:26:04 %S A106504 6,12,16,20,30,33,35,42,40,56,56,63,72,70,85,90,77,88,99,95,110,120, %T A106504 105,132,117,130,143,126,156,161,154,182,165,175,195,176,210,208,189, %U A106504 208,187,204,240,221,203,238,255,261,234,272,240,228,247,279,266,306,285 %N A106504 Longest side of primitive integer-sided triangle having an angle twice another, sorted on perimeter (A106499). %C A106504 Triple is (A106502, A106503, A106504). %H A106504 Saltire Software, <a href="http://www.saltire.com/applets/triangles/tri3s.htm">Triangle Given 3 Sides</a> %Y A106504 Cf. A106499-A106506, A106410, A106420, A106430. %K A106504 nonn %O A106504 1,1 %A A106504 _Lekraj Beedassy_, May 04 2005 %E A106504 Corrected and extended by _Ray Chandler_, May 09 2005