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A288738 Number of ways writing the n-th 7-smooth number as a product of decimal digits of some other number which has no digits equal to 1. 1
1, 1, 1, 2, 1, 2, 1, 3, 2, 1, 3, 1, 1, 4, 3, 2, 1, 5, 1, 2, 2, 2, 5, 1, 6, 3, 2, 2, 7, 1, 1, 4, 3, 3, 2, 7, 1, 9, 1, 4, 3, 3, 3, 9, 1, 2, 1, 7, 4, 5, 1, 3, 8, 2, 2, 13, 1, 2, 5, 5, 5, 1, 6, 2, 12, 2, 3, 2, 12, 5, 2, 7, 3, 1, 1, 6, 10, 4, 3, 17, 2, 3, 2, 7, 10, 7 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

This sequence is A067734 without the zeros.

LINKS

David A. Corneth, Table of n, a(n) for n = 1..10000

CROSSREFS

Cf. A002473, A007602, A067734.

Sequence in context: A231719 A123400 A232502 * A214651 A196059 A272900

Adjacent sequences:  A288735 A288736 A288737 * A288739 A288740 A288741

KEYWORD

nonn,base

AUTHOR

David A. Corneth, Jun 22 2017

STATUS

approved

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Last modified April 11 11:17 EDT 2021. Contains 342886 sequences. (Running on oeis4.)