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 A118238 #6 Jul 26 2015 10:14:08 %S A118238 15,52,26,63,37,74,48,85,59,96,70,8,9,10,2,3,4,5,6,7,8,9,10,2,3,4,5,6, %T A118238 7,8,9,10,2,3,4,5,6,7,8,9,10,2,3,4,5,6,7,8,9,10,2,3,4,5,6,7,8,9,10,2, %U A118238 3,4,5,6,7,8,9,10,2,3,4,5,6,7,8,9,10,2,3,4,5,6,7,8,9,10,2,3,4,5,6,7,8,9,10 %N A118238 Start with 15 and repeatedly reverse the digits and add 1 to get the next term. %C A118238 After 11 steps enters a cycle of length 9. %H A118238 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki. %t A118238 NestList[FromDigits[Reverse[IntegerDigits[#]]]+1&,15,100] (* _Harvey P. Dale_, Jul 26 2015 *) %Y A118238 Cf. A118551. %K A118238 base,nonn %O A118238 1,1 %A A118238 Luc Stevens (lms022(AT)yahoo.com), May 14 2006