OFFSET
0,2
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..200
EXAMPLE
if n=0 then C(2+2*0,2+0)*C(7+2*0,0+0) = C(2,2)*C(7,0) = 1*1 = 1.
if n=8 then C(2+2*8,2+8)*C(7+2*8,0+8) = C(18,10)*C(23,8) = 43758*490314 = 21455160012.
PROG
(PARI) a(n)={binomial(2+2*n, 2+n) * binomial(7+2*n, 0+n)} \\ Andrew Howroyd, Nov 08 2019
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Zerinvary Lajos, Feb 04 2006
EXTENSIONS
Terms a(13) and beyond from Andrew Howroyd, Nov 08 2019
STATUS
approved