Number of n-digit numbers with nonzero multiplicative digital root 3.

A051814

Number of n-digit numbers with nonzero multiplicative digital root 3.

Terms

    a(0) =1a(1) =7a(2) =40a(3) =240a(4) =1448a(5) =8630a(6) =53545a(7) =371845a(8) =3267453a(9) =36428242a(10) =442762543a(11) =5217693527a(12) =57321559329a(13) =586532407659

External references