A049029-OEIS公司

A049029号作为一个简单的表

n个	a（n）
1	1
2	5
三	1
4	45
5	15
6	1
7	585
8	255
9	30
10	1
11	9945
12	5175
13	825
14	50
15	1
16	208845
17	123795
18	24150
19	2025
20	75
21	1
22	5221125
23	3427515
24	775845
25	80850
26	4200
27	105
28	1
29	151412625
30	108046575
31	27478710
32	3363045
33	219450
34	7770
35	140
36	1
37	4996616625
38	3824996175
39	1069801425

[1,5,1,45,15,1,585,255,30,1,9945,5175,825,50,1,208845,123795,24150,2025,75,1,5221125,3427515,775845,80850,4200,105,1,151412625,108046575,27478710,3363045,219450,7770,140,1,4996616625,3824996175,1069801425]