A081529 Duplicate of A002944.

1, 1, 2, 3, 12, 10, 60, 105, 280, 252, 2520, 2310, 27720, 25740, 24024, 45045, 720720, 680680, 12252240, 11639628, 11085360, 10581480, 232792560, 223092870, 1070845776, 1029659400, 2974571600, 2868336900

Offset

1,3

Links

Table of n, a(n) for n=1..28.

Formula

Equals A003418(n) / n - Martin Fuller, Jan 03 2006

Crossrefs

Cf. A003418.

Sequence in context: A212303 A100561 A334721 * A002944 A266366 A201501

Adjacent sequences: A081526 A081527 A081528 * A081530 A081531 A081532

Keyword

dead

Extensions

More terms from Martin Fuller, Jan 03 2006

Status

approved