A051816 - OEIS

%I #4 Jun 11 2014 17:24:22

%S 1,7,58,422,2872,19772,142418,1096582,9040811,78452199,699839588,

%T 6297456806,56804155533,517737762700,4839960759976,46837953974511

%N Number of n-digit numbers with nonzero multiplicative digital root 5.

%D William Mayne, sci.math, Jun 15 1991

%F # { i : 10^(n-1) < i < 10^n and A051802(i)=5 }

%Y Cf. A051802, A051807, A051825.

%K nonn,base,hard

%O 1,2

%A _Dan Hoey_, Dec 09 1999