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A113888 C(2*n+1,n)*C(2*n+6,n+1). 0
6, 84, 1200, 17325, 252252, 3699696, 54609984, 810616950, 12092280200, 181176906768, 2725140250560, 41132585656890, 622787147955000, 9456196695480000, 143946539451475200, 2196309308974461450, 33581927605139911800, 514470608092210770000, 7895695609776494520000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..18.

EXAMPLE

If n=0 then C(1+2*0,0+0)*C(6+2*0,1+0)=C(1,0)*C(6,1)=1*6=6

If n=4 then C(1+2*4,0+4)*C(6+2*4,1+4)=C(9,4)*C(14,5)=126*2002=252252

If n=10 C(1+2*10,0+10)*C(6+2*10,1+10)=C(21,10)*C(26,11)=352716*7726160=2725140250560

MATHEMATICA

Table[Binomial[2n+1, n]Binomial[2n+6, n+1], {n, 0, 20}] (* Harvey P. Dale, Jun 14 2011 *)

CROSSREFS

Cf. A062190.

Sequence in context: A144514 A244284 A011945 * A163947 A306244 A277304

Adjacent sequences:  A113885 A113886 A113887 * A113889 A113890 A113891

KEYWORD

easy,nonn

AUTHOR

Zerinvary Lajos, Jan 28 2006

EXTENSIONS

Edited by N. J. A. Sloane, Feb 03 2007

STATUS

approved

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Last modified December 8 12:07 EST 2019. Contains 329862 sequences. (Running on oeis4.)