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 A033673 #16 Jul 08 2025 19:55:57 %S A033673 79,176,847,1595,7546,14003,44044,88088,176176,847847,1596595,7553546, %T A033673 14007103,44177144,88354288,176599676,853595347,1597190705,6668108656, %U A033673 13236127322,35608290553,71117571206 %N A033673 Trajectory of 79 under map x->x + (x-with-digits-reversed). %H A033673 <a href="/index/Res#RAA">Index entries for sequences related to Reverse and Add!</a> %F A033673 a(n)=A033654(n+1), n>0. [From _R. J. Mathar_, Oct 22 2008] %t A033673 NestList[#+IntegerReverse[#]&,79,30] (* _Harvey P. Dale_, Oct 02 2021 *) %K A033673 nonn,base %O A033673 0,1 %A A033673 _N. J. A. Sloane_