A175720 Duplicate of A173605.

1, 16, 240, 17293822569102704640

Offset

1,2

Links

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

Formula

A000005(a(n)) = a(n-1) + 4 for n >= 2.

Example

a(3) = 240 = the smallest number with 16 + 4 = 20 divisors.

Crossrefs

Cf. A014221, A173603, A175719.

Sequence in context: A005619 A204793 A173605 * A342031 A135518 A369393

Adjacent sequences: A175717 A175718 A175719 * A175721 A175722 A175723

Keyword

dead

Author

Jaroslav Krizek, Aug 15 2010

Status

approved