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 A026614 #4 Mar 30 2012 18:56:09 %S A026614 1,6,9,11,15,18,20,24,27,28,33,36,38,42,45,47,51,54,55,60,63,65,69,72, %T A026614 74,78,81,84,87,90,92,96,99,101,105,108,109,114,117,119,123,126,128, %U A026614 132,135,136,141,144,146,150,153,155,159,162 %N A026614 a(n) least k > a(n-1) such that a(k)=s(n), for n >= 2, where s = A026600. %K A026614 nonn %O A026614 1,2 %A A026614 _Clark Kimberling_