login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A107421 C(n+6,6)*C(n+9,9). 1
1, 70, 1540, 18480, 150150, 924924, 4624620, 19631040, 73002930, 243343100, 739763024, 2078672960, 5456516520, 13495999440, 31674284400, 70950397056, 152432493675, 315413948850, 630827897700, 1223211990000, 2305754601150, 4235059471500, 7595106655500 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

T. D. Noe, Table of n, a(n) for n = 0..1000

FORMULA

G.f.: (84*x^6+756*x^5+1890*x^4+1680*x^3+540*x^2+54*x+1)/(x-1)^16. - Harvey P. Dale, Jan 30 2013

EXAMPLE

If n=0 then C(0+6,6)*C(0+9,9)= C(6,6)*C(9,9)=1*1=1

If n=7 then C(7+6,6)*C(7+9,9)=C(13,6)*C(16,9)=1716*11440=19631040

MATHEMATICA

Table[Binomial[n+6, 6]Binomial[n+9, 9], {n, 0, 30}] (* Harvey P. Dale, Jan 30 2013 *)

PROG

(PARI) for(n=0, 29, print1(binomial(n+6, 6)*binomial(n+9, 9), ", "))

CROSSREFS

Cf. A062145.

Sequence in context: A061606 A298973 A278548 * A076430 A006296 A047835

Adjacent sequences:  A107418 A107419 A107420 * A107422 A107423 A107424

KEYWORD

easy,nonn

AUTHOR

Zerinvary Lajos, May 26 2005

EXTENSIONS

Corrected and extended by Rick L. Shepherd, May 27 2005

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 April 21 07:53 EDT 2019. Contains 322327 sequences. (Running on oeis4.)