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 A277884 #10 Nov 07 2016 11:05:11 %S A277884 0,1,2,3,4,1,5,6,7,8,2,6,9,1,10,11,12,13,14,6,4,8,10,15,16,13,2,11,17, %T A277884 1,18,19,20,21,22,6,23,13,10,3,7,1,14,15,17,8,24,25,26,27,22,11,4,13, %U A277884 18,25,28,21,2,19,29,1,30,31,32,33,34,6,35,21,10,25,36,37,22,3,17,13,5,15,12,38,2,15,23,1,24,39,28,37,14,25,40,8,41 %N A277884 a(n) = A277814(A277826(n)). %H A277884 Antti Karttunen, <a href="/A277884/b277884.txt">Table of n, a(n) for n = 0..65537</a> %F A277884 a(n) = A277814(A277826(n)). %F A277884 Other identities. For all n >= 0: %F A277884 a(A277817(n)) = n. %o A277884 (Scheme) (define (A277884 n) (A277814 (A277826 n))) %Y A277884 Cf. A264977, A277814. %Y A277884 Left inverse of A277817. %Y A277884 Cf. A277701, A277712, A277713, A277715 (positions of 1, 2, 3 and 8 in this sequence). %Y A277884 Cf. A277824, A277826 and their scatter-plots. %K A277884 nonn,look %O A277884 0,3 %A A277884 _Antti Karttunen_, Nov 06 2016