A175719 a(1) = 1, for n >= 2, a(n) = the smallest number m with (a(n-1) + 3) divisors.

1, 6, 36, 36864

Offset

1,2

Links

Table of n, a(n) for n=1..4.

Formula

A000005(a(n)) = a(n-1) + 3 for n >= 2.

Example

a(3) = 36 = the smallest number with 6 + 3 = 9 divisors.

Crossrefs

Cf. A014221, A173603, A173605.

Sequence in context: A202781 A067213 A173604 * A277726 A346356 A003351

Adjacent sequences: A175716 A175717 A175718 * A175720 A175721 A175722

Keyword

nonn

Author

Jaroslav Krizek, Aug 15 2010

Status

approved