A100648 Denominator of Cotesian number C(n,3).

8, 45, 144, 105, 17280, 14175, 5600, 12474, 1935360, 1576575, 28740096000, 156370500, 688816128, 97692469875, 26900729856000, 158428270000, 32593902501888000, 3430178002251, 1798063128576000, 988320969417600, 809280523999877529600000, 461635966995328125

Offset

3,1

References

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

Links

Table of n, a(n) for n=3..24.

Example

1/8, 16/45, 25/144, 34/105, 2989/17280, 5248/14175, 1209/5600, 5675/12474, 560593/1935360, 893128/1576575, 11148172711/28740096000, 109420087/156370500, ... = A100627/A100628

Crossrefs

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

Sequence in context: A247834 A210378 A247534 * A128091 A119950 A055367

Adjacent sequences: A100645 A100646 A100647 * A100649 A100650 A100651

Keyword

nonn

Author

N. J. A. Sloane, Dec 05 2004

Status

approved