A181643 - OEIS

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A181643 as a simple table

n	a(n)
1	0
2	0
3	0
4	0
5	40
6	6
7	18
8	0
9	0
10	0
11	0
12	0
13	0
14	4
15	10
16	0
17	0
18	0
19	0
20	5
21	7
22	0
23	0
24	1
25	0
26	0
27	0
28	72
29	0
30	15
31	0
32	0
33	0
34	128
35	0
36	0
37	0
38	0
39	936
40	0
41	800
42	0
43	0
44	0
45	360
46	196
47	0
48	0
49	0
50	0
51	0
52	0
53	0
54	54

[0,0,0,0,40,6,18,0,0,0,0,0,0,4,10,0,0,0,0,5,7,0,0, 1,0,0,0,72,0,15,0,0,0,128,0,0,0,0,936,0,800,0,0,0, 360,196,0,0,0,0,0,0,0,54]