A051823 Number of numbers below 10^n with nonzero multiplicative digital root 3.

1, 8, 48, 288, 1736, 10366, 63911, 435756, 3703209, 40131451, 482893994, 5700587521, 63022146850, 649554554509, 6315823743218, 59044525222412

Offset: 1

Author

Dan Hoey, Dec 09 1999

Keywords

• nonn
• base
• hard

References

• William Mayne, sci.math, Jun 15 1991

Crossrefs

Cf. A051802, A051805, A051814.

Formula

# { i : 10^(n-1) < i < 10^n and A051802(i)=3 }