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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
FORMULA
# { i : 10^(n-1) < i < 10^n and A051802(i)=5 }
CROSSREFS
Sequence in context: A121781 A121780 A121779 * A218927 A303485 A121778
KEYWORD
nonn,base,hard
AUTHOR
Dan Hoey, Dec 09 1999
STATUS
approved

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Last modified July 19 02:27 EDT 2024. Contains 374388 sequences. (Running on oeis4.)