A146365 - OEIS

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A146365 as a simple table

n	a(n)
1	1
2	1
3	1
4	9
5	25
6	125
7	1323
8	18755
9	388143
10	11998517
11	573092271
12	41661958269
13	4471274578309
14	730746269407465
15	180950069008864743

[1,1,1,9,25,125,1323,18755,388143,11998517, 573092271,41661958269,4471274578309, 730746269407465,180950069008864743]