A244492 - OEIS

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A244492 as a simple table

n	a(n)
0	1
1	0
2	3
3	3
4	0
5	6
6	0
7	15
8	0
9	10
10	15
11	0
12	45
13	0
14	15
15	0
16	105
17	0
18	105
19	0
20	21
21	105
22	0
23	420
24	0
25	210
26	0
27	28
28	0
29	945
30	0
31	1260
32	0
33	378
34	0
35	36
36	945
37	0
38	4725
39	0
40	3150
41	0
42	630
43	0
44	45

[1,0,3,3,0,6,0,15,0,10,15,0,45,0,15,0,105,0,105,0, 21,105,0,420,0,210,0,28,0,945,0,1260,0,378,0,36, 945,0,4725,0,3150,0,630,0,45]