A014621 - OEIS

A014621 as a simple table

n	a(n)
1	1
2	1
3	3
4	1
5	15
6	10
7	3
8	1
9	105
10	105
11	55
12	30
13	10
14	3
15	1
16	945
17	1260
18	910
19	630
20	350
21	168
22	76
23	30
24	10
25	3
26	1
27	10395
28	17325
29	15750
30	12880
31	9135
32	5789
33	3381
34	1806
35	910
36	434
37	196
38	76
39	30
40	10
41	3
42	1
43	135135
44	270270
45	294525
46	275275
47	228375
48	172200
49	120960
50	78519
51	48006
52	28336
53	16065
54	8609
55	4461
56	2166
57	1018
58	470
59	196
60	76
61	30
62	10
63	3
64	1

[1,1,3,1,15,10,3,1,105,105,55,30,10,3,1,945,1260, 910,630,350,168,76,30,10,3,1,10395,17325,15750, 12880,9135,5789,3381,1806,910,434,196,76,30,10,3, 1,135135,270270,294525,275275,228375,172200, 120960,78519,48006,28336,16065,8609,4461,2166, 1018,470,196,76,30,10,3,1]