OFFSET
2,2
LINKS
Michael De Vlieger, Table of n, a(n) for n = 2..205
MATHEMATICA
Array[Binomial[#^2, 2 #] &, 13, 2] (* Michael De Vlieger, May 21 2021 *)
PROG
(Python)
import math
for n in range(2, 22):
x = n*n
y = n+n
print(math.factorial(x) / (math.factorial(x-y) * math.factorial(y)), end=', ')
CROSSREFS
KEYWORD
nonn
AUTHOR
Alex Ratushnyak, Aug 18 2012
STATUS
approved