|
%I #4 Jun 11 2014 17:24:23
%S 1,4,25,180,1640,17678,213761,2572363,28717151,295374892,2863710220,
%T 27059835840,257084859669,2498594395926,24825380748687,249116120158421
%N Number of n-digit numbers with nonzero multiplicative digital root 9.
%D William Mayne, sci.math, Jun 15 1991
%F # { i : 10^(n-1) < i < 10^n and A051802(i)=9 }
%Y Cf. A051802, A051811, A051829.
%K nonn,base,hard
%O 1,2
%A _Dan Hoey_, Dec 09 1999
|
