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 A120217 #8 Jul 18 2015 14:43:50 %S A120217 100057,750003,300059,950005,500061,160007,700063,360009,900065, %T A120217 560011,110067,760013,310069,960015,510071,170017,710073,370019, %U A120217 910075,570021,120077,770023,320079,970025,520081,180027,720083,380029,920085,580031 %N A120217 Start with 100057 and repeatedly reverse the digits and add 2 to get the next term. %C A120217 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(100057,2). 100057 is the first S for which T(S,2) reaches a cycle of length 945. The cycle is simply the first 945 terms, which then repeat. A full period is given in the table. %H A120217 Klaus Brockhaus, <a href="/A120217/b120217.txt">Table of n, a(n) for n = 1,...,945</a> %H A120217 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki. %H A120217 <a href="/index/Rec#order_945">Index entries for linear recurrences with constant coefficients</a>, order 945. %Y A120217 Cf. A117521, A118514, A120214, A120215, A120216, A120218. %K A120217 nonn,base %O A120217 1,1 %A A120217 _Klaus Brockhaus_, Jun 11 2006