A051828 Number of numbers below 10^n with nonzero multiplicative digital root 8.

1, 24, 252, 2788, 31923, 352105, 3700992, 37619035, 375300388, 3721757919, 37050089673, 372206961122, 3774238125518, 38503409891419, 393429821383490, 4011462863576801

Offset

1,2

References

William Mayne, sci.math, Jun 15 1991

Links

Table of n, a(n) for n=1..16.

Formula

# { i : 10^(n-1) < i < 10^n and A051802(i)=8 }

Crossrefs

Cf. A051802, A051810, A051819.

Sequence in context: A278577 A022716 A181104 * A076847 A296575 A009175

Adjacent sequences: A051825 A051826 A051827 * A051829 A051830 A051831

Keyword

nonn,base,hard

Author

Dan Hoey, Dec 09 1999

Status

approved