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 A140204 #4 Mar 30 2012 18:54:36 %S A140204 0,1,2,4,5,7,9,9,10,12,14,17,19,22,22,23,24,26,28,31,33,33,36,37,39, %T A140204 42,45,49,49,50,51,53,54,56,58,58,60,63,66,67,69,72,72,73,76,80,81,83, %U A140204 85,85,88,89,92,93,97,99,99,100,101,103,104,106,108,108,109,111,113,116,118,121 %N A140204 Partial sums of A140084. %K A140204 nonn %O A140204 0,3 %A A140204 _Nadia Heninger_ and _N. J. A. Sloane_, Jun 09 2008