OFFSET
0,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..300
FORMULA
a(n) = Sum_{k=0..n} binomial(n^2, k) * binomial(n^2, n-k).
a(n) ~ (2*n)^(n-1/2) * exp(n-1/4) / sqrt(Pi). - Vaclav Kotesovec, Dec 01 2015
MATHEMATICA
Table[Binomial[2*n^2, n], {n, 0, 15}] (* Vaclav Kotesovec, Dec 01 2015 *)
PROG
(PARI) {a(n)=binomial(2*n^2, n)}
for(n=0, 15, print1(a(n), " "))
(PARI) {a(n)=sum(k=0, n, binomial(n^2, k)*binomial(n^2, n-k))}
for(n=0, 15, print1(a(n), " "))
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Nov 26 2015
STATUS
approved