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 A286578 #6 May 31 2017 16:16:01 %S A286578 0,0,2,3,0,4,6,2,7,9,3,10,5,0,12,15,4,8,16,6,19,21,2,22,13,7,24,11,9, %T A286578 27,30,3,17,31,10,34,36,5,18,37,0,40,20,12,42,28,15,26,45,4,49,51,8, %U A286578 52,54,16,55,29,6,33,25,19,14,57,21,64,43,2,66,69,22,39,35,13,70,75,7,44,76,24,48,79,11,82,61,9,84,23,27,87,90,30,47,46,3 %N A286578 a(n) = A285712(A286577(n)). %H A286578 Antti Karttunen, <a href="/A286578/b286578.txt">Table of n, a(n) for n = 1..9842</a> %F A286578 a(n) = A285712(A286577(n)). %o A286578 (Scheme) (define (A286578 n) (A285712 (A286577 n))) %Y A286578 Cf. A007051 (the positions of zeros), A064216, A285712, A286577, A285728. %K A286578 nonn %O A286578 1,3 %A A286578 _Antti Karttunen_, May 31 2017