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 A065209 #11 Dec 06 2024 16:24:39 %S A065209 69,78,87,96,174,175,183,192,195,273,274,280,290,291,294,372,381,390, %T A065209 471,472,480,492,539,570,571,579,591,599,629,638,649,670,678,679,690, %U A065209 698,699,728,729,748,749,769,778,789,798,819,827,836,839,847,876,877 %N A065209 Numbers which need four 'Reverse and Add' steps to reach a palindrome. %C A065209 The number of steps starts at 0, so palindromes (cf. A002113) are excluded. %C A065209 Numbers k such that A033665(k) = 4. - _Andrew Howroyd_, Dec 06 2024 %H A065209 Andrew Howroyd, <a href="/A065209/b065209.txt">Table of n, a(n) for n = 1..10000</a> %H A065209 <a href="/index/Res#RAA">Index entries for sequences related to Reverse and Add!</a> %o A065209 (PARI) select(k->isok(k,4), [1..900]) \\ isok defined in A065206. - _Andrew Howroyd_, Dec 06 2024 %Y A065209 Cf. A002113, A015980, A033665, A065206. %K A065209 nonn,base %O A065209 1,1 %A A065209 _Klaus Brockhaus_, Oct 21 2001 %E A065209 Offset changed from 0 to 1 by _Harry J. Smith_, Oct 14 2009