Number of n-digit numbers with nonzero multiplicative digital root 9.

A051820

Number of n-digit numbers with nonzero multiplicative digital root 9.

Terms

    a(0) =1a(1) =4a(2) =25a(3) =180a(4) =1640a(5) =17678a(6) =213761a(7) =2572363a(8) =28717151a(9) =295374892a(10) =2863710220a(11) =27059835840a(12) =257084859669

External references