A318222 - OEIS

A318222 as a simple table

n	a(n)
1	0
2	0
3	0
4	0
5	1
6	0
7	0
8	1
9	1
10	0
11	0
12	2
13	4
14	2
15	0
16	0
17	5
18	18
19	18
20	5
21	0
22	0
23	16
24	86
25	174
26	86
27	16
28	0
29	0
30	45
31	413
32	1538
33	1538
34	413
35	45
36	0
37	0
38	123
39	1975
40	13722
41	24576
42	13722
43	1975
44	123
45	0
46	0
47	340
48	9474
49	123415
50	407121
51	407121
52	123415
53	9474
54	340
55	0
56	0
57	946
58	45415
59	1108310
60	6735734

[0,0,0,0,1,0,0,1,1,0,0,2,4,2,0,0,5,18,18,5,0,0,16, 86,174,86,16,0,0,45,413,1538,1538,413,45,0,0,123, 1975,13722,24576,13722,1975,123,0,0,340,9474, 123415,407121,407121,123415,9474,340,0,0,946, 45415,1108310,6735734]