A054654 - OEIS

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A054654 as a simple table

n	a(n)
0	1
1	1
2	0
3	1
4	-1
5	0
6	1
7	-3
8	2
9	0
10	1
11	-6
12	11
13	-6
14	0
15	1
16	-10
17	35
18	-50
19	24
20	0
21	1
22	-15
23	85
24	-225
25	274
26	-120
27	0
28	1
29	-21
30	175
31	-735
32	1624
33	-1764
34	720
35	0
36	1
37	-28
38	322
39	-1960
40	6769
41	-13132
42	13068
43	-5040
44	0

[1,1,0,1,-1,0,1,-3,2,0,1,-6,11,-6,0,1,-10,35,-50, 24,0,1,-15,85,-225,274,-120,0,1,-21,175,-735,1624, -1764,720,0,1,-28,322,-1960,6769,-13132,13068, -5040,0]