A111979 - OEIS

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A111979 as a simple table

n	a(n)
0	0
1	1
2	0
3	16
4	0
5	1536
6	0
7	-319488
8	0
9	36007575552
10	0
11	-53682434054553600
12	0
13	1790644857560674043166720
14	0
15	-1280831660558056667387645027942400
16	0
17	18961467116136182692294341450867551502336000
18	0

[0,1,0,16,0,1536,0,-319488,0,36007575552,0, -53682434054553600,0,1790644857560674043166720,0, -1280831660558056667387645027942400,0, 18961467116136182692294341450867551502336000,0]