A180000 - OEIS

A180000 as a simple table

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	3
7	3
8	12
9	4
10	10
11	10
12	30
13	30
14	105
15	7
16	56
17	56
18	252
19	252
20	1260
21	60
22	330
23	330
24	1980
25	396
26	2574
27	286
28	2002
29	2002
30	15015
31	15015
32	240240
33	7280
34	61880
35	1768
36	15912
37	15912
38	151164
39	3876
40	38760
41	38760
42	406980
43	406980
44	4476780
45	99484
46	1144066

[1,1,1,1,2,2,3,3,12,4,10,10,30,30,105,7,56,56,252, 252,1260,60,330,330,1980,396,2574,286,2002,2002, 15015,15015,240240,7280,61880,1768,15912,15912, 151164,3876,38760,38760,406980,406980,4476780, 99484,1144066]