A127188 - OEIS

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A127188 as a simple table

n	a(n)
0	1
1	1
2	0
3	0
4	0
5	1
6	-3
7	18
8	-121
9	1044
10	-11112
11	142419
12	-2164506
13	38488964
14	-791648701
15	18649007091
16	-498838420314
17	15036512507141
18	-507331242588268
19	19044960439970134
20	-791159753019542794

[1,1,0,0,0,1,-3,18,-121,1044,-11112,142419, -2164506,38488964,-791648701,18649007091, -498838420314,15036512507141,-507331242588268, 19044960439970134,-791159753019542794]