A120987 - OEIS

A120987 as a simple table

n	a(n)
0	1
1	0
2	3
3	0
4	3
5	6
6	0
7	1
8	16
9	10
10	0
11	0
12	15
13	51
14	15
15	0
16	0
17	6
18	90
19	126
20	21
21	0
22	0
23	1
24	77
25	357
26	266
27	28
28	0
29	0
30	0
31	36
32	504
33	1107
34	504
35	36
36	0
37	0
38	0
39	9
40	414
41	2304
42	2907
43	882
44	45
45	0
46	0
47	0
48	1
49	210
50	2850
51	8350
52	6765
53	1452
54	55
55	0
56	0
57	0
58	0
59	66
60	2277
61	14355
62	25653
63	14355
64	2277
65	66
66	0
67	0
68	0
69	0
70	12

[1,0,3,0,3,6,0,1,16,10,0,0,15,51,15,0,0,6,90,126, 21,0,0,1,77,357,266,28,0,0,0,36,504,1107,504,36,0, 0,0,9,414,2304,2907,882,45,0,0,0,1,210,2850,8350, 6765,1452,55,0,0,0,0,66,2277,14355,25653,14355, 2277,66,0,0,0,0,12]