A032337 - OEIS

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A032337 as a simple table

n	a(n)
1	2
2	2
3	0
4	0
5	0
6	720
7	10080
8	241920
9	5080320
10	108864000
11	2474841600
12	60833203200
13	1569209241600
14	42978897561600
15	1265828788224000
16	38916389191680000
17	1280474741145600000
18	44189183316934656000

[2,2,0,0,0,720,10080,241920,5080320,108864000, 2474841600,60833203200,1569209241600, 42978897561600,1265828788224000,38916389191680000, 1280474741145600000,44189183316934656000]