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 A118512 #12 Oct 13 2024 12:42:57
%S A118512 11,12,22,23,33,34,44,45,55,56,66,67,77,78,88,89,99,100,2,3,4,5,6,7,8,
%T A118512 9,10,2,3,4,5,6,7,8,9,10,2,3,4,5,6,7,8,9,10,2,3,4,5,6,7,8,9,10,2,3,4,
%U A118512 5,6,7,8,9,10,2,3,4,5,6,7,8,9,10,2,3,4,5,6,7,8,9,10,2,3,4,5,6,7,8,9,10
%N A118512 Define sequence S_m by: initial term = m, reverse digits and add 1 to get next term. Entry shows S_11. This reaches a cycle of length 9 in 18 steps.
%H A118512 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki.
%H A118512 <a href="/index/Rec#order_09">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 0, 0, 0, 1).
%t A118512 NestList[FromDigits[Reverse[IntegerDigits[#]]]+1&,11,90] (* _Harvey P. Dale_, Oct 16 2011 *)
%t A118512 Join[{11,12,22,23,33,34,44,45,55,56,66,67,77,78,88,89,99,100},LinearRecurrence[{0,0,0,0,0,0,0,0,1},{2,3,4,5,6,7,8,9,10},72]] (* _Ray Chandler_, Jul 18 2015 *)
%t A118512 NestList[IntegerReverse[#]+1&,11,90] (* _Harvey P. Dale_, Oct 13 2024 *)
%Y A118512 Cf. A118510, A117831, A117230.
%K A118512 nonn,base
%O A118512 1,1
%A A118512 _N. J. A. Sloane_, May 06 2006