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 A065217 #14 Dec 06 2024 16:24:26
%S A065217 2069,2159,2249,2339,2429,2519,2609,2699,2789,2879,2969,3068,3158,
%T A065217 3248,3338,3428,3518,3608,3698,3788,3878,3968,4067,4157,4247,4337,
%U A065217 4427,4517,4607,4697,4787,4877,4967,5066,5156,5246,5336,5426,5516,5606,5696,5786
%N A065217 Numbers which need 12 'Reverse and Add' steps to reach a palindrome.
%C A065217 The number of steps starts at 0, so palindromes (cf. A002113) are excluded. This sequence coincides with the corresponding sequence not excluding palindromes (A015993) for the entries shown in the database. The first divergence occurs at 10901.
%C A065217 Numbers k such that A033665(k) = 12. - _Andrew Howroyd_, Dec 06 2024
%H A065217 Harry J. Smith, <a href="/A065217/b065217.txt">Table of n, a(n) for n = 1..1000</a>
%H A065217 <a href="/index/Res#RAA">Index entries for sequences related to Reverse and Add!</a>
%o A065217 (PARI) isok(n,s=12)={for(k=0, s, my(r=fromdigits(Vecrev(digits(n)))); if(r==n, return(k==s)); n += r); 0} \\ _Andrew Howroyd_, Dec 06 2024
%Y A065217 Cf. A002113, A015993, A033665, A065206.
%K A065217 nonn,base
%O A065217 1,1
%A A065217 _Klaus Brockhaus_, Oct 21 2001
%E A065217 Offset changed from 0 to 1 by _Harry J. Smith_, Oct 14 2009