login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A100647 Numerator of Cotesian number C(n,3). 0
1, 16, 25, 34, 2989, 5248, 1209, 5675, 560593, 893128, 11148172711, 109420087, 349259195, 83221185536, 17347403755459, 161769065751, 26070191142124243, 4137435748625, 1745702310941533, 1389851895548897, 936428641553074799449741, 748157499921069376 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

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: A274240 A176512 A001033 * A245371 A235717 A319388

Adjacent sequences:  A100644 A100645 A100646 * A100648 A100649 A100650

KEYWORD

nonn,frac

AUTHOR

N. J. A. Sloane, Dec 05 2004

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 20 22:57 EST 2020. Contains 331104 sequences. (Running on oeis4.)