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 A065321 #7 Mar 30 2012 17:27:33 %S A065321 10833,11823,12813,13803,20832,21822,22812,23802,30831,31821,32811, %T A065321 33801,40830,41820,42810,43800,1006804,1016704,1026604,1027920, %U A065321 1028941,1036504,1037820,1038841,1046404,1047720,1048741,1048903,1056304 %N A065321 Numbers n such that 54 'Reverse and Add' steps are needed to reach a palindrome. %C A065321 The number of steps starts at 0, so palindromes (cf. A002113) are excluded. 54 is a record (cf. A065199) for the number of 'Reverse and Add' steps needed to reach a palindrome. %H A065321 <a href="/index/Res#RAA">Index entries for sequences related to Reverse and Add!</a> %Y A065321 A002113, A065198, A065199, A065318. %K A065321 base,nonn %O A065321 1,1 %A A065321 _Klaus Brockhaus_, Oct 30 2001