A339757 a(n) is the number of Zuckerman numbers k for which k/A007954(k) = n, where A007954(k) is the product of the decimal digits of k.

9, 1, 2, 1, 1, 1, 1, 2, 3, 0, 1, 2, 3, 1, 0, 0, 1, 3, 2, 0, 1, 2, 3, 0, 0, 0, 1, 2, 2, 0

Offset

1,1

Comments

The indices of 0's are A342593.

Links

Table of n, a(n) for n=1..30.

Example

The integers k=1 to 9 are the Zuckerman numbers that satisfy k/A007954(k)=1, so a(1)=9.

Crossrefs

Cf. A007954 (product of decimal digits), A007602 (Zuckerman numbers), A056770.

Cf. A288069 (Zuckerman quotients), A342593 (Zuckerman non-quotients).

Cf. A343036, A343050.

Sequence in context: A068452 A021527 A257437 * A354347 A010166 A186116

Adjacent sequences: A339754 A339755 A339756 * A339758 A339759 A339760

Keyword

nonn,base,more

Author

Michel Marcus, Apr 04 2021

Status

approved