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 A268709 #6 Feb 13 2016 23:17:27 %S A268709 1,1,2,3,5,9,15,25,40,75,134,246,428,802,1453,2643,4587,8851,16849, %T A268709 32368,60503,117343 %N A268709 Number of iterations of A268395 needed to reach zero from 2^n: a(n) = A268708(2^n). %F A268709 a(n) = A268708(2^n). %o A268709 (Scheme) (define (A268709 n) (A268708 (A000079 n))) %Y A268709 Cf. A000079, A268395, A268708, A268710. %K A268709 nonn,more %O A268709 0,3 %A A268709 _Antti Karttunen_, Feb 11 2016