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 A092169 #2 Mar 31 2012 13:21:57 %S A092169 1,0,3,9,10,21,21,32,39,53,55,73,78,101,113,128,136,165,171,201,220, %T A092169 245,253,292,305,341,360,393,406,455,465,512,542,581,607,654,666,725, %U A092169 757,804,820,889,903,969,1011,1061,1081,1160,1183,1255,1295,1353,1378,1467 %N A092169 A000217(n)-A092674(n). %K A092169 nonn %O A092169 1,3 %A A092169 _Jon Perry_, Apr 01 2004