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 A268393 #9 Feb 07 2016 20:15:01 %S A268393 1,2,4,8,15,28,52,99,193,377,739,1459,2908,5799,11537,23021,45971, %T A268393 91857,183513 %N A268393 Positions of records in permutation A267107. %C A268393 These are horizontal positions of the tip of the "left wing" of each successive flying/swimming creature seen in the scatter plot of A267107. %F A268393 Other identities. For all n >= 1: %F A268393 a(n) = A267107(A268394(n)). %o A268393 (Scheme, with _Antti Karttunen_'s IntSeq-library) %o A268393 (define A268393 (RECORD-POS 1 1 A267107)) %Y A268393 Cf. A267107. %Y A268393 Cf. A268394 (gives the corresponding values). %K A268393 nonn,more %O A268393 1,2 %A A268393 _Antti Karttunen_, Feb 06 2016