A052145 - cp's OEIS frontend

A052145 a(n) = (2n-1)*(2n-1)!/n.

n	a(n)
1	1
2	9
3	200
4	8820
5	653184
6	73180800
7	11564467200
8	2451889440000
9	671854030848000
10	231125690776780800
11	97537253236899840000
12	49549698749529538560000
13	29829250083328819200000000
14	20999962511521107738624000000
15	17094073187896757112117657600000

[1, 9, 200, 8820, 653184, 73180800, 11564467200, 2451889440000, 671854030848000, 231125690776780800, 97537253236899840000, 49549698749529538560000, 29829250083328819200000000, 20999962511521107738624000000, 17094073187896757112117657600000]

cp's OEIS Frontend

A052145 a(n) = (2n-1)*(2n-1)!/n.

Table of values

List of values