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 A118161 #9 Jul 17 2020 13:05:09 %S A118161 1,56,120,76,122,276,727,782,342,298,947,804,463,419,969,1024,4256, %T A118161 6579,9811,1244,4476,6799,10031,13056,65086,68111,11241,14266,66296, %U A118161 69321,12451,15476,67506,60631,13661,16686,68716,61841,14871,17896,69926 %N A118161 Start with 1 and repeatedly reverse the digits and add 55 to get the next term. %C A118161 After 1371 steps enters a cycle of 36. %H A118161 Georg Fischer, <a href="/A118161/b118161.txt">Table of n, a(n) for n = 1..2000</a> %H A118161 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki. %Y A118161 Cf. A117828, A117816, A117817. %K A118161 base,nonn,less,easy %O A118161 1,2 %A A118161 Luc Stevens (lms022(AT)yahoo.com), May 14 2006 %E A118161 a(23) ff. corrected by _Georg Fischer_, Jul 17 2020