A155797 - OEIS

A155797 as a simple table

n	a(n)
0	1
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	1
13	0
14	0
15	0
16	0
17	6
18	6
19	0
20	0
21	0
22	0
23	28
24	84
25	28
26	0
27	0
28	0
29	0
30	120
31	792
32	792
33	120
34	0
35	0
36	0
37	0
38	495
39	6435
40	12870
41	6435
42	495
43	0
44	0
45	0
46	0
47	2002
48	48620
49	167960
50	167960
51	48620
52	2002
53	0
54	0
55	0
56	0
57	8008
58	352716
59	1961256
60	3268760
61	1961256
62	352716

[1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,6,6,0,0,0,0,28, 84,28,0,0,0,0,120,792,792,120,0,0,0,0,495,6435, 12870,6435,495,0,0,0,0,2002,48620,167960,167960, 48620,2002,0,0,0,0,8008,352716,1961256,3268760, 1961256,352716]