A015067 - OEIS

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A015067 as a simple table

n	a(n)
0	1
1	0
2	0
3	0
4	750
5	7770
6	52675
7	449550
8	2311575
9	8624700
10	22661835
11	42102850
12	57811425
13	58254700
14	42267025
15	22408050
16	8633100
17	2316300
18	470625
19	61950
20	525
21	50
22	0
23	0
24	0
25	1

[1,0,0,0,750,7770,52675,449550,2311575,8624700, 22661835,42102850,57811425,58254700,42267025, 22408050,8633100,2316300,470625,61950,525,50,0,0, 0,1]