A209687 - OEIS

A209687 as a simple table

n	a(n)
1	1
2	0
3	2
4	0
5	1
6	5
7	0
8	1
9	5
10	12
11	0
12	1
13	6
14	18
15	29
16	0
17	1
18	7
19	26
20	58
21	70
22	0
23	1
24	8
25	35
26	98
27	175
28	169
29	0
30	1
31	9
32	45
33	149
34	339
35	507
36	408
37	0
38	1
39	10
40	56
41	212
42	574
43	1108
44	1428
45	985
46	0
47	1
48	11
49	68
50	288
51	894
52	2066
53	3476
54	3940
55	2378
56	0
57	1
58	12
59	81
60	378
61	1314
62	3492
63	7074
64	10572

[1,0,2,0,1,5,0,1,5,12,0,1,6,18,29,0,1,7,26,58,70, 0,1,8,35,98,175,169,0,1,9,45,149,339,507,408,0,1, 10,56,212,574,1108,1428,985,0,1,11,68,288,894, 2066,3476,3940,2378,0,1,12,81,378,1314,3492,7074, 10572]