A378239 - OEIS

A378239 as a simple table

n	a(n)
0	1
1	1
2	0
3	1
4	2
5	0
6	1
7	4
8	12
9	0
10	1
11	6
12	28
13	100
14	0
15	1
16	8
17	48
18	248
19	968
20	0
21	1
22	10
23	72
24	452
25	2480
26	10208
27	0
28	1
29	12
30	100
31	720
32	4680
33	26688
34	113792
35	0
36	1
37	14
38	132
39	1060
40	7728
41	51504
42	301648
43	1318832
44	0
45	1
46	16
47	168
48	1480
49	11800
50	87104
51	591312
52	3531424
53	15732064
54	0

[1,1,0,1,2,0,1,4,12,0,1,6,28,100,0,1,8,48,248,968, 0,1,10,72,452,2480,10208,0,1,12,100,720,4680, 26688,113792,0,1,14,132,1060,7728,51504,301648, 1318832,0,1,16,168,1480,11800,87104,591312, 3531424,15732064,0]