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%I #10 Jan 10 2023 11:38:44
%S 0,3,13,47,55,254,767,987,6909,16127,28657,28670,125951,196575,393213,
%T 4160255,4177911,25157623,25157631,46137325,67088375,268296191,
%U 268434303,268435455
%N First occurrence of n in A220115.
%C Least k such that A000120(k) - A007895(k) = n.
%Y Cf. A000120, A007895, A220115, A220118.
%K nonn,base,more
%O 0,2
%A _Alex Ratushnyak_, Dec 05 2012