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 A118533 #10 Jul 20 2015 12:36:55 %S A118533 1,17,87,94,65,72,43,50,21,28,98,105,517,731,153,367,779,993,415,530, %T A118533 51,31,29,108,817,734,453,370,89,114,427,740,63,52,41,30,19,107,717, %U A118533 733,353,369,979,995,615,532,251,168,877,794,513,331,149,957 %N A118533 Start with 1 and repeatedly reverse the digits and add 16 to get the next term. %H A118533 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki. %H A118533 <a href="/index/Rec#order_90">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, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1). %F A118533 After 721 steps enters a cycle of length 90. %t A118533 NestList[FromDigits[Reverse[IntegerDigits[#]]]+16&,1,60] (* _Harvey P. Dale_, Jul 19 2011 *) %Y A118533 Cf. A117828, A117816, A117817. %K A118533 nonn,base %O A118533 1,2 %A A118533 _N. J. A. Sloane_, May 06 2006