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 A175515 #2 Mar 30 2012 18:52:39 %S A175515 1,2,3,4,6,9,10,14,15,21,22,25,26,33,34,35,38,39,46,49,51,55,57,58,62, %T A175515 65,69,74,77,82,85,86,87,91,93,94,95,106,111,115,118,119,121,122,123, %U A175515 129,133,134,141,142,143,145,146,155,158,159,161,166,169,177,178,183 %N A175515 1,2,3 together with the semiprimes A001358. %Y A175515 Cf. A171581, A176540. %K A175515 nonn %O A175515 1,2 %A A175515 _Juri-Stepan Gerasimov_, Jun 05 2010