A134828 - OEIS

A134828 as a simple table

n	a(n)
0	1
1	0
2	1
3	0
4	1
5	0
6	5
7	0
8	7
9	0
10	21
11	0
12	33
13	0
14	429
15	0
16	715
17	0
18	2431
19	0
20	4199
21	0
22	29393
23	0
24	52003
25	0
26	185725
27	0
28	334305
29	0
30	9694845
31	0
32	17678835
33	0
34	64822395
35	0
36	119409675
37	0
38	883631595
39	0
40	1641030105
41	0
42	6116566755
43	0
44	11435320455
45	0
46	171529806825
47	0

[1,0,1,0,1,0,5,0,7,0,21,0,33,0,429,0,715,0,2431,0, 4199,0,29393,0,52003,0,185725,0,334305,0,9694845, 0,17678835,0,64822395,0,119409675,0,883631595,0, 1641030105,0,6116566755,0,11435320455,0, 171529806825,0]