A182688 a(n) = the largest 1-digit number with exactly n divisors, a(n) = 0 if no such number exists.

1, 7, 9, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

Offset

1,2

Links

Table of n, a(n) for n=1..40.

Formula

A000005(a(n)) = n for n <= 4.

4 = max n such that a(n) > 0, a(n) = 0 for n > 4.

Crossrefs

Cf. A182687.

Sequence in context: A076668 A010729 A340220 * A342571 A372253 A256924

Adjacent sequences: A182685 A182686 A182687 * A182689 A182690 A182691

Keyword

nonn,base,less

Author

Jaroslav Krizek, Nov 27 2010

Status

approved