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A051826 Number of numbers below 10^n with nonzero multiplicative digital root 6. 1
1, 15, 213, 2337, 23231, 231651, 2349105, 23926057, 242539688, 2437578213, 24286001675, 240505616138, 2376317894981, 23497985025226, 232875555403623, 2312981893109766 (list; graph; refs; listen; history; text; internal format)
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)=6 }

CROSSREFS

Cf. A051802, A051808, A051817.

Sequence in context: A135519 A179091 A201340 * A081196 A020287 A152272

Adjacent sequences:  A051823 A051824 A051825 * A051827 A051828 A051829

KEYWORD

nonn,base,hard

AUTHOR

Dan Hoey, Dec 09 1999

STATUS

approved

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Last modified November 22 05:55 EST 2019. Contains 329388 sequences. (Running on oeis4.)