A327022 - OEIS

A327022 as a simple table

n	a(n)
0	1
1	1
2	1
3	6
4	1
5	30
6	90
7	1
8	56
9	70
10	1260
11	2520
12	1
13	90
14	420
15	3780
16	9450
17	75600
18	113400
19	1
20	132
21	990
22	924
23	8910
24	83160
25	34650
26	332640
27	1247400
28	6237000
29	7484400
30	1
31	182
32	2002
33	6006
34	18018
35	270270
36	252252
37	630630
38	1081080
39	15135120
40	12612600
41	37837800
42	189189000
43	681080400
44	681080400

[1,1,1,6,1,30,90,1,56,70,1260,2520,1,90,420,3780, 9450,75600,113400,1,132,990,924,8910,83160,34650, 332640,1247400,6237000,7484400,1,182,2002,6006, 18018,270270,252252,630630,1081080,15135120, 12612600,37837800,189189000,681080400,681080400]