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A051821 Number of numbers below 10^n with nonzero multiplicative digital root 1 (not counting 0). 1
1, 6, 30, 273, 3321, 38545, 413435, 4179623, 40717550, 389610397, 3704647927, 35103992478, 330893886987, 3100780107689, 28983549003377, 272016949455533 (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)=1 }
CROSSREFS
Sequence in context: A052585 A304188 A343574 * A099031 A066108 A205339
KEYWORD
nonn,base,hard
AUTHOR
Dan Hoey, Dec 09 1999
STATUS
approved

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Last modified July 21 22:27 EDT 2024. Contains 374478 sequences. (Running on oeis4.)