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A051825 Number of numbers below 10^n with nonzero multiplicative digital root 5. 1
1, 8, 66, 488, 3360, 23132, 165550, 1262132, 10302943, 88755142, 788594730, 7086051536, 63890207069, 581627969769, 5421588729745, 52259542704256 (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)=5 }

CROSSREFS

Cf. A051802, A051807, A051816.

Sequence in context: A121781 A121780 A121779 * A218927 A303485 A121778

Adjacent sequences:  A051822 A051823 A051824 * A051826 A051827 A051828

KEYWORD

nonn,base,hard

AUTHOR

Dan Hoey, Dec 09 1999

STATUS

approved

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Last modified June 6 18:59 EDT 2020. Contains 334832 sequences. (Running on oeis4.)