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%I #6 Jan 30 2024 08:23:26
%S 0,0,1,0,2,3,0,0,0,4,5,6,7,8,0,0,0,0,0,0,0,0,0,9,10,11,12,13,14,15,16,
%T 17,18,19,20,21,22,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
%U 0,0,0,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44
%N Inverse function of N -> N injection A072795.
%C a(1)=0 because A072795(0)=1, but a(n) = 0 also for those n which do not occur as values of A072795. All positive natural numbers occur here once.
%F a(n) = A083924(n)*A072772(n).
%Y a(A072795(n)) = n for all n. Cf. A083925, A083927-A083929, A083935.
%K nonn
%O 0,5
%A _Antti Karttunen_, May 13 2003
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