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A085199 Inverse function of N -> N injection A071156. 1

%I #6 Jan 12 2024 10:59:50

%S 0,1,0,2,0,3,0,0,0,4,0,5,0,0,0,6,0,7,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,9,

%T 0,10,0,0,0,11,0,12,0,0,0,0,0,13,0,0,0,0,0,0,0,0,0,14,0,15,0,0,0,16,0,

%U 17,0,0,0,0,0,18,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,19,0,20,0,0,0,0,0,21,0,0,0

%N Inverse function of N -> N injection A071156.

%C a(0)=0 because A071156(0)=0, but a(n) = 0 also for those n which do not occur as values of A071156. All positive natural numbers occur here once.

%F a(n) = A057164(A085200(n)).

%Y a(A071156(n)) = n for all n.

%K nonn

%O 0,4

%A _Antti Karttunen_, Jun 14 2003

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Last modified March 28 16:34 EDT 2024. Contains 371254 sequences. (Running on oeis4.)