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Inverse function of N->N injection A126011.
2

%I #4 Mar 31 2012 13:21:13

%S 0,1,2,3,4,0,5,0,0,6,0,0,7,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,9,10,

%T 0,0,11,0,0,0,0,0,0,0,0,0,0,0,12,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,13,

%U 14,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,15,16,0,0

%N Inverse function of N->N injection A126011.

%C a(0)=0 because A126011(0)=0, but a(n) = 0 also for those n which do not occur as values of A126011. All positive natural numbers occur here once.

%H A. Karttunen, <a href="/A126000/a126000.scm.txt">Scheme-program for computing this sequence.</a>

%Y a(A126011(n)) = n for all n.

%K nonn

%O 0,3

%A _Antti Karttunen_, Dec 18 2006