OFFSET
0,2
EXAMPLE
if n=0 then C(1+2*0,1+0)*C(6+2*0,0+0)=C(1,1)*C(6,0)=1*1=1
if n=10 then C(1+2*n,1+n)*C(6+2*n,0+n)=C(21,11)*C(26,10)=352716*5311735=1873533922260
MATHEMATICA
Table[Binomial[2n+1, n+1]Binomial[2n+6, n], {n, 0, 20}] (* Harvey P. Dale, Jun 08 2013 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Zerinvary Lajos, Feb 04 2006
EXTENSIONS
More terms from Harvey P. Dale, Jun 08 2013
STATUS
approved