A344057 - cp's OEIS frontend

A344057 a(n) = (2*n)! / CatalanNumber(n - 1) for n >= 1 and a(0) = 1.

n	a(n)
0	1
1	2
2	24
3	360
4	8064
5	259200
6	11404800
7	660441600
8	48771072000
9	4477184409600
10	500391198720000
11	66920738734080000
12	10554356508917760000
13	1938789402181632000000
14	410402940653807861760000
15	99180710658003566592000000
16	27141314475238493257728000000

[1, 2, 24, 360, 8064, 259200, 11404800, 660441600, 48771072000, 4477184409600, 500391198720000, 66920738734080000, 10554356508917760000, 1938789402181632000000, 410402940653807861760000, 99180710658003566592000000, 27141314475238493257728000000]

cp's OEIS Frontend

A344057 a(n) = (2*n)! / CatalanNumber(n - 1) for n >= 1 and a(0) = 1.

Table of values

List of values