A072118 - OEIS

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A072118 as a simple table

n	a(n)
1	1
2	2
3	5
4	224
5	672
6	2737152
7	8895744
8	474439680
9	130660687872
10	4513732853760000
11	15798064988160000
12	894413525483520000
13	3194334019584000000
14	27610545531676262400000
15	8107146431738442547200000

[1,2,5,224,672,2737152,8895744,474439680, 130660687872,4513732853760000,15798064988160000, 894413525483520000,3194334019584000000, 27610545531676262400000,8107146431738442547200000]