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 A072217 #8 Mar 30 2012 16:49:29 %S A072217 2,24,23,21,55,64,96,96,98,109,149,149,188,186,201,197,236,232 %N A072217 Consider the Reverse and Add! problem (cf. A001127); of all the n-digit numbers N which eventually reach a palindrome, pick that number N which takes the greatest number of steps to converge (in case of a tie, pick the smallest N); sequence gives number of steps N takes to converge. %C A072217 Since we do not even know if 196 eventually converges (see A006960, A023108) for n >= 3 these values are only conjectures. %H A072217 Jason Doucette, <a href="http://www.jasondoucette.com/worldrecords.html">World records</a> %H A072217 <a href="/index/Res#RAA">Index entries for sequences related to Reverse and Add!</a> %Y A072217 Cf. A072216, A072218, A001127, A006960, A023108. %K A072217 nonn,hard,base %O A072217 1,1 %A A072217 _N. J. A. Sloane_, Jul 05 2002 %E A072217 Corrected and extended by Jason Doucette, Mar 29 2005; Oct 09 2005