A121547 - OEIS

A121547 as a simple table

n	a(n)
0	0
1	0
2	1
3	0
4	4
5	4
6	0
7	10
8	20
9	10
10	0
11	20
12	60
13	60
14	20
15	0
16	35
17	140
18	210
19	140
20	35
21	0
22	56
23	280
24	560
25	560
26	280
27	56
28	0
29	84
30	504
31	1260
32	1680
33	1260
34	504
35	84
36	0
37	120
38	840
39	2520
40	4200
41	4200
42	2520
43	840
44	120
45	0
46	165
47	1320
48	4620
49	9240
50	11550
51	9240
52	4620
53	1320
54	165
55	0
56	220
57	1980
58	7920
59	18480
60	27720
61	27720
62	18480
63	7920
64	1980
65	220

[0,0,1,0,4,4,0,10,20,10,0,20,60,60,20,0,35,140, 210,140,35,0,56,280,560,560,280,56,0,84,504,1260, 1680,1260,504,84,0,120,840,2520,4200,4200,2520, 840,120,0,165,1320,4620,9240,11550,9240,4620,1320, 165,0,220,1980,7920,18480,27720,27720,18480,7920, 1980,220]