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 A033866 #5 Mar 30 2012 18:35:33 %S A033866 1,10,19,59,69,166,79,188,193,1397,829,167,2069,1797,849,177,1496,739, %T A033866 1798,10777,6999,1297,869,187,89,10797,10853,10921,10971,13297,10548, %U A033866 13293,17793,20889,700269,106977,108933,80359,13697,10794,15891 %N A033866 Least number of Reverse-then-add persistence n. %Y A033866 Essentially same as A023109. %K A033866 nonn,base %O A033866 0,2 %A A033866 _David W. Wilson_