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%I #10 Apr 25 2020 03:18:25
%S 0,1,2,4,10,58,43,191,246,320,2000,1602,4172,7598,21843,36520,27737
%N a(n) is the index of the first occurrence of n in A080071, or 0 for those n>0 which never occur in A080071.
%C 17 does not occur among the first 404631 terms of A080071.
%Y Cf. A080071.
%K nonn,more
%O 0,3
%A _Antti Karttunen_, Jan 27 2003