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A051817 Number of n-digit numbers with nonzero multiplicative digital root 6. 1
1, 14, 198, 2124, 20894, 208420, 2117454, 21576952, 218613631, 2195038525, 21848423462, 216219614463, 2135812278843, 21121667130245, 209377570378397, 2080106337706143 (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, A051826.

Sequence in context: A041085 A124239 A041366 * A199707 A222586 A221830

Adjacent sequences:  A051814 A051815 A051816 * A051818 A051819 A051820

KEYWORD

nonn,base,hard

AUTHOR

Dan Hoey, Dec 09 1999

STATUS

approved

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Last modified August 25 13:50 EDT 2019. Contains 326324 sequences. (Running on oeis4.)