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 A118637 #10 Aug 11 2014 22:45:28 %S A118637 1,31,43,64,76,97,109,931,169,991,229,952,289,1012,2131,1342,2461, %T A118637 1672,2791,2002,2032,2332,2362,2662,2692,2992,3022,2233,3352,2563, %U A118637 3682,2893,4012,2134,4342,2464,4672,2794,5002,2035,5332,2365,5662,2695,5992,3025 %N A118637 Start with 1 and repeatedly reverse the digits and add 30 to get the next term. %H A118637 Harvey P. Dale, <a href="/A118637/b118637.txt">Table of n, a(n) for n = 1..1000</a> %H A118637 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki. %F A118637 Never reaches a cycle (see A117816). %t A118637 NestList[FromDigits[Reverse[IntegerDigits[#]]]+30&,1,60] (* _Harvey P. Dale_, Jul 19 2014 *) %Y A118637 Cf. A117828, A117816, A117817. %K A118637 base,nonn %O A118637 1,2 %A A118637 Luc Stevens (lms022(AT)yahoo.com), May 09 2006 %E A118637 Corrected by _Harvey P. Dale_, Jul 19 2014