OFFSET
0,2
FORMULA
D-finite with recurrence n*(n+1)*a(n) - 2*(n+3)*(2*n+1)*a(n-1) = 0. - R. J. Mathar, Aug 09 2015
G.f.: 2F1(3/2,4;2;4x). - R. J. Mathar, Aug 09 2015
MAPLE
seq(binomial(n+2, 3)/2*binomial(2*n, n), n=1..20); # Zerinvary Lajos, Jan 18 2007
MATHEMATICA
Table[Binomial[2 n + 1, n + 1]Binomial[n + 3, 3], {n, 0, 30}]
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Mario Catalani (mario.catalani(AT)unito.it), Jun 26 2003
STATUS
approved