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 A175042 #5 Feb 18 2015 08:03:02 %S A175042 12,11,7,12,29,17,19,20,4,17,7,20,27,29,25,24,12,5,21,29,17,17,32,28, %T A175042 27,10,5,17,6,30,29,6,5,18,21,10,9,6,9,26,5,9,9,16,2,9,16,9,12,25,6, %U A175042 21,18,15,6,6,21,21,3,17,19,8,8,13,11,17,27,8,27,28,28,26,16,23,17,5,5,17,18 %N A175042 Number of iterations required for A169639 to reach a loop. %K A175042 nonn,word %O A175042 1,1 %A A175042 _Jacques ALARDET_, Apr 05 2010 %E A175042 Edited by _N. J. A. Sloane_, Apr 05 2010