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 A175103 #2 Mar 30 2012 17:26:31 %S A175103 0,42,53,117,154,2377,3245,3771,6381,9688,10406,13879,13944,14056, %T A175103 15026,18884,26521,29565,30735,36362,39310,43337,48808,54415,58308, %U A175103 62228,63378,69111,77403,81750,86021,93545,94388,103961,119754,152555,162698 %N A175103 Integers n such that 17+30*n are terms in A172456. %F A175103 a(n)=(A172456(n)-17)/30. %Y A175103 Cf. A172456. %K A175103 nonn %O A175103 1,2 %A A175103 _Zak Seidov_, Feb 07 2010