A351780 - OEIS

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A351780 as a simple table

n	a(n)
0	1
1	0
2	-2
3	6
4	108
5	-2420
6	8730
7	1313718
8	-57930152
9	567983736
10	109544982390
11	-9917916180590
12	321821829728388
13	32383946348733252
14	-6591798188344856942
15	531702135210365508270
16	11136706526396459006640

[1,0,-2,6,108,-2420,8730,1313718,-57930152, 567983736,109544982390,-9917916180590, 321821829728388,32383946348733252, -6591798188344856942,531702135210365508270, 11136706526396459006640]