A339350 - OEIS

A339350 as a simple table

n	a(n)
0	1
1	1
2	0
3	1
4	3
5	0
6	1
7	6
8	15
9	0
10	1
11	9
12	39
13	91
14	0
15	1
16	12
17	72
18	272
19	612
20	0
21	1
22	15
23	114
24	570
25	1995
26	4389
27	0
28	1
29	18
30	165
31	1012
32	4554
33	15180
34	32890
35	0
36	1
37	21
38	225
39	1625
40	8775
41	36855
42	118755
43	254475
44	0
45	1
46	24
47	294
48	2436
49	15225
50	75516
51	302064
52	949344
53	2017356
54	0

[1,1,0,1,3,0,1,6,15,0,1,9,39,91,0,1,12,72,272,612, 0,1,15,114,570,1995,4389,0,1,18,165,1012,4554, 15180,32890,0,1,21,225,1625,8775,36855,118755, 254475,0,1,24,294,2436,15225,75516,302064,949344, 2017356,0]