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 A151733 #2 Mar 30 2012 16:51:06 %S A151733 0,1,3,7,10,16,20,27,35,47,54,64,76,86,94,112,128,150,172,190,208,232, %T A151733 252,276,299,329,364,386,408,440,470,500,538,574,606,638,680,727,778, %U A151733 812,854,898,956,1002,1062,1125,1188,1240,1304,1356,1404 %N A151733 A151731/2. %K A151733 nonn %O A151733 0,3 %A A151733 _N. J. A. Sloane_, Jun 15 2009