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%I #6 May 16 2018 20:06:58
%S 1,2,4,6,11,3,42,20,8,12,237,5,1798,43,14,96,7192,9,69611,16,45,238,
%T 431203,21,32,1799,25,47,2401568,13
%N Inverse of A304531.
%C This is the left inverse of A304531, and also the right inverse if A304531 indeed is a permutation of natural numbers.
%F For all n >= 1, a(A304531(n)) = n.
%o (PARI) \\ Use the program given in A304531.
%Y Cf. A304531 (inverse).
%Y Cf. also A303752.
%K nonn,hard,more
%O 1,2
%A _Antti Karttunen_, May 14 2018