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 A118529 #12 Dec 16 2024 13:53:12 %S A118529 1,13,43,46,76,79,109,913,331,145,553,367,775,589,997,811,130,43,46, %T A118529 76,79,109,913,331,145,553,367,775,589,997,811,130,43,46,76,79,109, %U A118529 913,331,145,553,367,775,589,997,811,130,43,46,76,79,109,913,331 %N A118529 Start with 1 and repeatedly reverse the digits and add 12 to get the next term. %H A118529 Harvey P. Dale, <a href="/A118529/b118529.txt">Table of n, a(n) for n = 1..1000</a> %H A118529 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki. %H A118529 <a href="/index/Rec#order_15">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1). %F A118529 After 2 steps enters a cycle of length 15. %t A118529 NestList[IntegerReverse[#]+12&,1,60] (* _Harvey P. Dale_, Dec 16 2024 *) %Y A118529 Cf. A117828, A117816, A117817. %K A118529 nonn,base %O A118529 1,2 %A A118529 _N. J. A. Sloane_, May 06 2006