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 A118216 #6 Mar 26 2015 15:42:24
%S A118216 1,70,76,136,700,76,136,700,76,136,700,76,136,700,76,136,700,76,136,
%T A118216 700,76,136,700,76,136,700,76,136,700,76,136,700,76,136,700,76,136,
%U A118216 700,76,136,700,76,136,700,76,136,700,76,136,700,76,136,700,76,136,700,76,136
%N A118216 Start with 1 and repeatedly reverse the digits and add 69 to get the next term.
%H A118216 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki.
%e A118216 After 2 steps enters a cycle of 3.
%t A118216 NestList[FromDigits[Reverse[IntegerDigits[#]]]+69&,1,70] (* or *) PadRight[{1,70},70,{136,700,76}] (* _Harvey P. Dale_, Mar 26 2015 *)
%Y A118216 Cf. A117828, A117816, A117817.
%K A118216 base,nonn,less
%O A118216 1,2
%A A118216 Luc Stevens (lms022(AT)yahoo.com), May 14 2006