A004747 - OEIS

A004747 as a simple table

n	a(n)
1	1
2	2
3	1
4	10
5	6
6	1
7	80
8	52
9	12
10	1
11	880
12	600
13	160
14	20
15	1
16	12320
17	8680
18	2520
19	380
20	30
21	1
22	209440
23	151200
24	46480
25	7840
26	770
27	42
28	1
29	4188800
30	3082240
31	987840
32	179760
33	20160
34	1400
35	56
36	1
37	96342400
38	71998080
39	23826880
40	4583040
41	562800
42	45360
43	2352
44	72
45	1

[1,2,1,10,6,1,80,52,12,1,880,600,160,20,1,12320, 8680,2520,380,30,1,209440,151200,46480,7840,770, 42,1,4188800,3082240,987840,179760,20160,1400,56, 1,96342400,71998080,23826880,4583040,562800,45360, 2352,72,1]