A151524 - OEIS

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A151524 as a simple table

n	a(n)
1	1
2	1
3	3
4	5
5	12
6	24
7	58
8	126
9	300
10	686
11	1630
12	3792
13	8983
14	21051
15	49776
16	116858
17	275789
18	647573
19	1525847
20	3580673
21	8424978
22	19755938
23	46426810

[1,1,3,5,12,24,58,126,300,686,1630,3792,8983, 21051,49776,116858,275789,647573,1525847,3580673, 8424978,19755938,46426810]