A166322 - OEIS

A166322 as a simple table

n	a(n)
7	1
8	7
9	28
10	84
11	210
12	462
13	917
14	1667
15	2807
16	4417
17	6538
18	9142
19	12117
20	15267
21	18327
22	20993
23	22967
24	24017
25	24017
26	22967
27	20993
28	18327
29	15267
30	12117
31	9142
32	6538
33	4417
34	2807
35	1667
36	917
37	462
38	210
39	84
40	28
41	7
42	1

[1,7,28,84,210,462,917,1667,2807,4417,6538,9142, 12117,15267,18327,20993,22967,24017,24017,22967, 20993,18327,15267,12117,9142,6538,4417,2807,1667, 917,462,210,84,28,7,1]