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 A065213 #19 Dec 08 2024 14:15:16 %S A065213 193,391,490,589,688,886,985,1993,1995,2994,3991,4990,4992,5991,6990, %T A065213 8059,8149,8239,8329,8419,8509,8599,8689,8779,8869,8959,9058,9069, %U A065213 9089,9148,9159,9179,9238,9249,9269,9328,9359,9418,9429,9508,9519,9539,9598 %N A065213 Numbers which need eight 'Reverse and Add' steps to reach a palindrome. %C A065213 The number of steps starts at 0, so palindromes (cf. A002113) are excluded. %C A065213 Numbers k such that A033665(k) = 8. - _Andrew Howroyd_, Dec 08 2024 %H A065213 Vincenzo Librandi, <a href="/A065213/b065213.txt">Table of n, a(n) for n = 1..1000</a> %H A065213 <a href="/index/Res#RAA">Index entries for sequences related to Reverse and Add!</a> %t A065213 lenQ[n_]:=Length[NestWhileList[#+FromDigits[Reverse[IntegerDigits[#]]]&, n, #!=FromDigits[Reverse[IntegerDigits[#]]]&,1,10]]==9; Select[Range[ 10000], lenQ] (* _Harvey P. Dale_, Aug 09 2013 *) %Y A065213 Cf. A002113, A015988, A033665, A065206. %K A065213 nonn,base %O A065213 1,1 %A A065213 _Klaus Brockhaus_, Oct 21 2001 %E A065213 Offset changed from 0 to 1 by _Harry J. Smith_, Oct 14 2009