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 A099055 #6 Mar 30 2012 17:36:53 %S A099055 1,4,9,15,21,28,36,42,51,59,67,75,85,92,102,112,120,128,141,147,159, %T A099055 169,177,187,199,208,218,228,240,248,262,268,281,293,301,313,327,333, %U A099055 345,357,369,378,392,400,412,426,436,444,460,468,483,493,503,515,529,539 %N A099055 A bisection of A054519. %K A099055 nonn %O A099055 0,2 %A A099055 _N. J. A. Sloane_, Nov 15 2004 %E A099055 More terms from _Joshua Zucker_, May 12 2006