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 A118153 #7 May 26 2014 23:48:47 %S A118153 1,58,142,298,949,1006,6058,8563,3715,5230,382,340,100,58,142,298,949, %T A118153 1006,6058,8563,3715,5230,382,340,100,58,142,298,949,1006,6058,8563, %U A118153 3715,5230,382,340,100,58,142,298,949,1006,6058,8563,3715,5230,382,340 %N A118153 Start with 1 and repeatedly reverse the digits and add 57 to get the next term. %C A118153 After 1 step enters a cycle of 12. %H A118153 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki. %t A118153 NestList[FromDigits[Reverse[IntegerDigits[#]]]+57&,1,50] (* _Harvey P. Dale_, Feb 23 2012 *) %Y A118153 Cf. A117828, A117816, A117817. %K A118153 base,nonn,less %O A118153 1,2 %A A118153 Luc Stevens (lms022(AT)yahoo.com), May 14 2006