A076107 - OEIS

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A076107 as a simple table

n	a(n)
1	1
2	0
3	8
4	0
5	623
6	119
7	117646
8	0
9	2183
10	976558
11	25937424596
12	0
13	23298085122475
14	48444505197
15	29192926025390618
16	0
17	48661191875666868473
18	21523352
19	104127350297911241532832
20	0
21	278218429446951548637196391

[1,0,8,0,623,119,117646,0,2183,976558,25937424596, 0,23298085122475,48444505197,29192926025390618,0, 48661191875666868473,21523352, 104127350297911241532832,0, 278218429446951548637196391]