A075352 Group the natural numbers so that the product of the terms of the n-th group is just >= n!: (1), (2), (3, 4), (5, 6), (7, 8, 9), (10, 11, 12), (13, 14, 15, 16), (17, 18, 19, 20), (21, 22, 23, 24, 25), (26, 27, 28, 29, 30), ... Sequence gives product of numbers in each group.

1, 2, 12, 30, 504, 1320, 43680, 116280, 6375600, 17100720, 1402410240, 3776965920, 8835488640, 1022755734000, 2478652606080, 380634949094400, 945378254620800, 186127248627129600, 470489622136934400, 115590003914312928000

Offset

1,2

Links

Table of n, a(n) for n=1..20.

Crossrefs

Cf. A075353, A075354, A075355, A075356.

Sequence in context: A124903 A197954 A276451 * A116655 A361760 A085892

Adjacent sequences: A075349 A075350 A075351 * A075353 A075354 A075355

Keyword

nonn

Author

Amarnath Murthy, Sep 19 2002

Extensions

More terms from David Wasserman, Jan 16 2005

Status

approved