A146937 - OEIS

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A146937 as a simple table

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	2
9	3
10	6
11	9
12	14
13	23
14	61
15	135
16	392
17	922
18	2676
19	7151
20	26809
21	87678
22	375597
23	1374921
24	6569486
25	27726558
26	157145315
27	778948913
28	5094691047
29	28915328479
30	216796412908

[1,1,1,1,1,1,1,2,3,6,9,14,23,61,135,392,922,2676, 7151,26809,87678,375597,1374921,6569486,27726558, 157145315,778948913,5094691047,28915328479, 216796412908]