A156414 - OEIS

A156414 as a simple table

n	a(n)
0	1
1	0
2	0
3	0
4	820
5	0
6	0
7	0
8	3360
9	0
10	0
11	0
12	36432
13	13751
14	0
15	0
16	31360
17	0
18	0
19	0
20	195030
21	56610
22	0
23	0
24	267840
25	0
26	0
27	0
28	311160
29	591360
30	0
31	0
32	1153590
33	0
34	0
35	0
36	1588985
37	1579898
38	0
39	0
40	3060152
41	0
42	0
43	0
44	6895464
45	5338980
46	0
47	0
48	7741574
49	0
50	0
51	0
52	12164249
53	10043220
54	0
55	0

[1,0,0,0,820,0,0,0,3360,0,0,0,36432,13751,0,0, 31360,0,0,0,195030,56610,0,0,267840,0,0,0,311160, 591360,0,0,1153590,0,0,0,1588985,1579898,0,0, 3060152,0,0,0,6895464,5338980,0,0,7741574,0,0,0, 12164249,10043220,0,0]