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 A119902 #9 May 26 2014 23:48:49 %S A119902 100016,610006,600021,120011,110026,620016,610031,130021,120036, %T A119902 630026,620041,140031,130046,640036,630051,150041,140056,650046, %U A119902 640061,160051,150066,660056,650071,170061,160076,670066,660081,180071,170086,680076 %N A119902 Start with 100016 and repeatedly reverse the digits and add 5 to get the next term. %C A119902 Let T(S,Q) be the sequence obtained by starting with S and repeatedly reversing the digits and adding Q to get the next term. This is T(10016,5). 100016 is the first S for which T(S,5) reaches a cycle of length 756. The cycle is simply the first 756 terms, which then repeat. A full period is given in the table. %H A119902 Klaus Brockhaus, <a href="/A119902/b119902.txt">Table of n, a(n) for n = 1,...,756</a> %H A119902 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki. %t A119902 NestList[FromDigits[Reverse[IntegerDigits[#]]]+5&,100016,40] (* _Harvey P. Dale_, Feb 24 2011 *) %Y A119902 Cf. A117800, A118879, A118878. %K A119902 nonn,base %O A119902 1,1 %A A119902 _Klaus Brockhaus_, May 28 2006