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 A118619 #11 Jul 17 2020 16:49:11 %S A118619 1,34,76,100,34,76,100,34,76,100,34,76,100,34,76,100,34,76,100,34,76, %T A118619 100,34,76,100,34,76,100,34,76,100,34,76,100,34,76,100,34,76,100,34, %U A118619 76,100,34,76,100,34,76,100,34,76,100,34,76,100,34,76,100,34,76,100,34,76 %N A118619 Start with 1 and repeatedly reverse the digits and add 33 to get the next term. %C A118619 After 1 step enters a cycle of length 3. %H A118619 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki. %H A118619 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (0,0,1). %Y A118619 Cf. A117828, A117816, A117817. %K A118619 base,nonn,easy %O A118619 1,2 %A A118619 Luc Stevens (lms022(AT)yahoo.com), May 08 2006 %E A118619 79 replaced with 76 by _Georg Fischer_, Jul 17 2020