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 A065320 #12 Sep 24 2013 06:53:52 %S A065320 10677,11667,12657,13647,14637,15627,16617,17607,20676,21666,22656, %T A065320 23646,24636,25626,26616,27606,30675,31665,32655,33645,34635,35625, %U A065320 36615,37605,40674,41664,42654,43644,44634,45624,46614,47604,50673 %N A065320 53 'Reverse and Add' steps are needed to reach a palindrome. %C A065320 The number of steps starts at 0, so palindromes (cf. A002113) are excluded. 53 is a record (cf. A065199) of the number of 'Reverse and Add' steps needed to reach a palindrome. %C A065320 The first term not congruent 84 mod 99 is a(64) = 109902, thereafter the residues show no obvious pattern. - Klaus Brockhaus, Jul 14 2003 %H A065320 Vincenzo Librandi, <a href="/A065320/b065320.txt">Table of n, a(n) for n = 1..67</a> %H A065320 <a href="/index/Res#RAA">Index entries for sequences related to Reverse and Add!</a> %t A065320 lenQ[n_]:= Length[NestWhileList[# + FromDigits[Reverse[IntegerDigits[#]]]&, n, #! = FromDigits[Reverse[IntegerDigits[#]]]&, 1, 54]] == 54; Select[Range[10000], lenQ] (* _Vincenzo Librandi_, Sep 24 2013 *) %Y A065320 Cf. A002113, A065198, A065199, A065318. %K A065320 nonn,base %O A065320 1,1 %A A065320 _Klaus Brockhaus_, Oct 30 2001 %E A065320 Changed offset from 0 to 1 by _Vincenzo Librandi_, Sep 24 2013