OFFSET
0,2
COMMENTS
Fifth column of A104684.
LINKS
Michael De Vlieger, Table of n, a(n) for n = 0..1642
Ömür Deveci and Anthony G. Shannon, Some aspects of Neyman triangles and Delannoy arrays, Mathematica Montisnigri (2021) Vol. L, 36-43.
FORMULA
G.f.: (1+12x+6x^2)/(1-4x)^(9/2).
D-finite with recurrence n^2*a(n) -2*(n+2)*(2*n+3)*a(n-1)=0. - R. J. Mathar, Feb 20 2015
G.f.: 2F1(5/2,3;1;4x). - R. J. Mathar, Aug 09 2015
a(n) = (n+1)*A002803(n). - R. J. Mathar, Aug 09 2015
MATHEMATICA
Table[Binomial[2n+4, n]Binomial[n+4, 4], {n, 0, 20}] (* Harvey P. Dale, May 03 2019 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, May 02 2005
STATUS
approved