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 A083929 #7 Jan 30 2024 04:37:06 %S A083929 0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, %T A083929 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0, %U A083929 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 %N A083929 Inverse function of N -> N injection A083930. %C A083929 a(0)=0 because A083930(0)=0, but a(n) = 0 also for those n which do not occur as values of A083930. All positive natural numbers occur here once. %C A083929 It appears that A071661(n) = A083929(A071663(A083930(n))) and A071662 = A083929(A071664(A083930(n))). %F A083929 a(n) = A083927(A083925(n)). %Y A083929 a(A080930(n)) = n for all n. Cf. A083925-A083928, A083935. %K A083929 nonn %O A083929 0,50 %A A083929 _Antti Karttunen_, May 13 2003