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 A097624 #3 Mar 30 2012 18:50:45 %S A097624 1,2,3,4,5,6,8,9,11,10,16,12,19,23,15,18,29,21,32,20,24,43,47,28,53, %T A097624 38,33,46,67,30,73,36,48,58,40,42,101,103,57,45,113,56,125,86,55,94, %U A097624 137,63,149,65,87,76,167,66,80,72,96,134,193,60,199,146,88,108,95,112,239,116 %N A097624 Smallest m such that A097621(m) = n. %K A097624 nonn %O A097624 1,2 %A A097624 _Reinhard Zumkeller_, Aug 17 2004