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 A218617 #15 Jul 25 2025 16:46:57 %S A218617 0,1,18,59,7814 %N A218617 Positions in A213728 and A213729 where the next record length run starts. %C A218617 A218545(A218546(n)) gives the records (of run lengths), which for the first five cases are: 1, 2, 4, 6, 8. %C A218617 A213729(a(n)) gives the parity of the n-th record run, which for the first case (n=1) is 0, and for the next four (n=2..5) is 1. %F A218617 a(n) = A218784(A218546(n)-1). %o A218617 (Scheme) (define (A218617 n) (A218784 (-1+ (A218546 n)))) %Y A218617 A218547(n) = a(n)+1. %K A218617 nonn,more %O A218617 1,3 %A A218617 _Antti Karttunen_, Nov 11 2012