A371400 - OEIS

A371400 as a simple table

n	a(n)
0	1
1	2
2	2
3	6
4	9
5	6
6	20
7	40
8	40
9	20
10	70
11	175
12	225
13	175
14	70
15	252
16	756
17	1176
18	1176
19	756
20	252
21	924
22	3234
23	5880
24	7056
25	5880
26	3234
27	924
28	3432
29	13728
30	28512
31	39600
32	39600
33	28512
34	13728
35	3432
36	12870
37	57915
38	135135
39	212355
40	245025
41	212355
42	135135
43	57915
44	12870

[1,2,2,6,9,6,20,40,40,20,70,175,225,175,70,252, 756,1176,1176,756,252,924,3234,5880,7056,5880, 3234,924,3432,13728,28512,39600,39600,28512,13728, 3432,12870,57915,135135,212355,245025,212355, 135135,57915,12870]