OFFSET
0,2
COMMENTS
Special values of hypergeometric function of type 1F3.
For all n it seems that the last digit of a(n) is either 1 or 9.
MAPLE
Digits:= 1100:
a:= n-> round(evalf((n+2)!^2*(n+1)!/4*hypergeom([-n], [2, 3, 3], -1))):
seq(a(n), n=0..20); # Alois P. Heinz, Mar 04 2014
MATHEMATICA
Table[(n+2)!^2*(n+1)!/4*HypergeometricPFQ[{-n}, {2, 3, 3}, -1], {n, 0, 10}] (* Vaclav Kotesovec, Mar 04 2014 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Karol A. Penson, Mar 04 2014
STATUS
approved