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Search: id:A051828
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A051828 Number of numbers below 10^n with nonzero multiplicative digital root 8. +0
2
1, 24, 252, 2788, 31923, 352105, 3700992, 37619035, 375300388, 3721757919, 37050089673, 372206961122, 3774238125518, 38503409891419, 393429821383490, 4011462863576801 (list; graph; listen)
OFFSET

1,2

REFERENCES

William Mayne, sci.math, Jun 15 1991

FORMULA

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

CROSSREFS

Cf. A051802, A051810, A051819.

Sequence in context: A086603 A000594 A022716 this_sequence A076847 A009175 A000145

Adjacent sequences: A051825 A051826 A051827 this_sequence A051829 A051830 A051831

KEYWORD

nonn,base,hard

AUTHOR

Dan Hoey (Hoey(AT)AIC.NRL.Navy.Mil), Dec 09 1999

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Last modified December 4 23:11 EST 2009. Contains 170347 sequences.


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