A156925 - OEIS

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A156925 as a simple table

n	a(n)
0	1
1	1
2	1
3	1
4	8
5	-11
6	-6
7	1
8	38
9	-108
10	-242
11	839
12	-444
13	-180
14	1
15	144
16	-425
17	-7382
18	48451
19	-96764
20	-2559
21	257002
22	-312444
23	88344
24	30240
25	1
26	487
27	720
28	-130472
29	1277794
30	-4193514
31	-6504496

[1,1,1,1,8,-11,-6,1,38,-108,-242,839,-444,-180,1, 144,-425,-7382,48451,-96764,-2559,257002,-312444, 88344,30240,1,487,720,-130472,1277794,-4193514, -6504496]