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 A118536 #14 Jul 20 2015 10:47:05 %S A118536 1,37,109,937,775,613,352,289,1018,8137,7354,4573,3790,1009,9037,7345, %T A118536 5473,3781,1909,9127,7255,5563,3691,1999,10027,72037,73063,36073, %U A118536 37099,99109,90235,53245,54271,17281,18307,70417,71443,34453,35479,97489,98515,51625 %N A118536 Start with 1 and repeatedly reverse the digits and add 36 to get the next term. %C A118536 This is the first known example of a sequence from this family which reaches a cycle of length 2. %C A118536 That cycle begins at a(407) and is (64, 82). - _Harvey P. Dale_, Apr 12 2013 %H A118536 T. D. Noe, <a href="/A118536/b118536.txt">Table of n, a(n) for n = 1..500</a> %H A118536 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki. %H A118536 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (0, 1). %F A118536 After 406 steps enters a cycle of length 2. %t A118536 NestList[FromDigits[Reverse[IntegerDigits[#]]]+36&,1,500] (* _Harvey P. Dale_, Apr 12 2013 *) %Y A118536 Cf. A117828, A117816, A117817. %K A118536 nonn,base %O A118536 1,2 %A A118536 Luc Stevens (lms022(AT)yahoo.com), May 07 2006 %E A118536 Corrected by _Harvey P. Dale_, Apr 12 2013