A100644 Denominator of Cotesian number C(n,1).

2, 3, 8, 45, 96, 35, 17280, 14175, 89600, 149688, 29030400, 79625, 402361344000, 312741000, 229605376, 488462349375, 83691159552000, 50697046400, 8604790260498432, 1470076286679, 29967718809600000, 4694524604733600000, 269760174666625843200000, 5699209469078125

Offset

1,1

References

Charles Jordan, Calculus of Finite Differences, Chelsea 1965, p. 513.

Links

Table of n, a(n) for n=1..24.

Example

1/2, 2/3, 3/8, 16/45, 25/96, 9/35, 3577/17280, 2944/14175, 15741/89600, 26575/149688, 4495513/29030400, 12504/79625, 56280729661/402361344000, 44436679/312741000, ... = A100623/A100624 = A002178/A002176 (the latter not being in lowest terms)

Crossrefs

See A002176 for further references. A diagonal of A100640/A100641.

Sequence in context: A042553 A042139 A118127 * A013208 A094370 A066084

Adjacent sequences: A100641 A100642 A100643 * A100645 A100646 A100647

Keyword

nonn,frac

Author

N. J. A. Sloane, Dec 04 2004

Status

approved