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 A118531 #9 Jul 20 2015 12:24:12 %S A118531 1,15,65,70,21,26,76,81,32,37,87,92,43,48,98,103,315,527,739,951,173, %T A118531 385,597,809,922,243,356,667,780,101,115,525,539,949,963,383,397,807, %U A118531 722,241,156,665,580,99,113,325,537,749,961,183,395,607,720 %N A118531 Start with 1 and repeatedly reverse the digits and add 14 to get the next term. %H A118531 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki. %H A118531 <a href="/index/Rec#order_72">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1). %F A118531 After 15 steps enters a cycle of length 72. %t A118531 NestList[FromDigits[Reverse[IntegerDigits[#]]]+14&,1,60] (* _Harvey P. Dale_, Jul 11 2013 *) %Y A118531 Cf. A117828, A117816, A117817. %K A118531 nonn,base %O A118531 1,2 %A A118531 _N. J. A. Sloane_, May 06 2006