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A051817 Number of n-digit numbers with nonzero multiplicative digital root 6. 1

%I

%S 1,14,198,2124,20894,208420,2117454,21576952,218613631,2195038525,

%T 21848423462,216219614463,2135812278843,21121667130245,

%U 209377570378397,2080106337706143

%N Number of n-digit numbers with nonzero multiplicative digital root 6.

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

%F # { i : 10^(n-1) < i < 10^n and A051802(i)=6 }

%Y Cf. A051802, A051808, A051826.

%K nonn,base,hard

%O 1,2

%A _Dan Hoey_, Dec 09 1999

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Last modified October 18 07:19 EDT 2019. Contains 328146 sequences. (Running on oeis4.)