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 A118150 #12 Sep 21 2023 11:25:55 %S A118150 1,54,98,142,294,545,598,948,902,262,315,566,718,870,131,184,534,488, %T A118150 937,792,350,106,654,509,958,912,272,325,576,728,880,141,194,544,498, %U A118150 947,802,261,215,565,618,869,1021,1254,4574,4807,7137,7370,790,150,104 %N A118150 Start with 1 and repeatedly reverse the digits and add 53 to get the next term. %C A118150 After 49 steps enters a cycle of 54. %H A118150 Vincenzo Librandi, <a href="/A118150/b118150.txt">Table of n, a(n) for n = 1..1000</a> %H A118150 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki. %t A118150 NestList[IntegerReverse[#]+53&,1,60] (* _Harvey P. Dale_, Sep 21 2023 *) %Y A118150 Cf. A117828, A117816, A117817. %K A118150 base,nonn,less %O A118150 1,2 %A A118150 Luc Stevens (lms022(AT)yahoo.com), May 14 2006 %E A118150 Corrected by _Harvey P. Dale_, Apr 19 2014