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URL: https://oeis.org/A051819

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A051819

Number of n-digit numbers with nonzero multiplicative digital root 8.

1

1, 23, 228, 2536, 29135, 320182, 3348887, 33918043, 337681353, 3346457531, 33328331754, 335156871449, 3402031164396, 34729171765901, 354926411492071, 3618033042193311

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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, A051828.

Sequence in context: A285552 A206766 A142490 * A179631 A144248 A124336

Adjacent sequences: A051816 A051817 A051818 * A051820 A051821 A051822

KEYWORD

nonn,base,hard

AUTHOR

Dan Hoey, Dec 09 1999

STATUS

approved