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%I #7 Jan 14 2021 19:58:30
%S 1,5,24,243,3048,35224,374890,3766188,36537927,348892847,3315037530,
%T 31399344551,295789894509,2769886220702,25882768895688,243033400452156
%N Number of n-digit numbers with nonzero multiplicative digital root 1.
%C Not counting zero as a one-digit number.
%D William Mayne, sci.math, Jun 15 1991
%F a(n) = # { i : 10^(n-1) < i < 10^n and A051802(i)=1 }.
%Y Cf. A051802, A051803, A051821.
%K nonn,base,hard
%O 1,2
%A _Dan Hoey_, Dec 09 1999
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