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 A084108 #9 Jan 30 2024 02:54:38 %S A084108 0,1,6,477,11231586,17656351387745509, %T A084108 118547604486270210927391203275078974, %U A084108 14557702344245589436016960628730576845591277100880695377777962217288601549 %N A084108 A014486-indices of "Complete Binary Trees". %C A084108 Fixed points of permutations A069767 and A069768. %F A084108 a(n) = A080300(A084107(n)). %Y A084108 a(n) = A057117(A083942(n)). Also iterates of A080298, i.e., a(1)=A080298(0), a(2)=A080298(A080298(0)), a(3)=A080298(A080298(A080298(0))), etc. Cf. also A083940, A080274. %K A084108 nonn %O A084108 0,3 %A A084108 _Antti Karttunen_, May 13 2003