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 A118149 #7 May 26 2014 23:48:47 %S A118149 1,53,87,130,83,90,61,68,138,883,440,96,121,173,423,376,725,579,1027, %T A118149 7253,3579,9805,5141,1467,7693,4019,9156,6571,1808,8133,3370,785,639, %U A118149 988,941,201,154,503,357,805,560,117,763,419,966,721,179,1023,3253,3575 %N A118149 Start with 1 and repeatedly reverse the digits and add 52 to get the next term. %C A118149 After 2 steps enters a cycle of length 99. %H A118149 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki. %t A118149 NestList[FromDigits[Reverse[IntegerDigits[#]]]+52&,1,55] (* _Harvey P. Dale_, May 08 2011 *) %Y A118149 Cf. A117828, A117816, A117817. %K A118149 base,nonn,less %O A118149 1,2 %A A118149 Luc Stevens (lms022(AT)yahoo.com), May 14 2006