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, 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

Offset: 1

Author

David A. Corneth, Jun 22 2017

Keywords

• nonn
• base

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.