A146434 - OEIS

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A146434 as a simple table

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	3
10	1
11	5
12	1
13	9
14	3
15	20
16	7
17	76
18	13
19	246
20	27
21	866
22	99
23	3607
24	409
25	20611
26	1589
27	124905
28	6601
29	826121
30	37581

[1,1,1,1,1,1,1,1,3,1,5,1,9,3,20,7,76,13,246,27, 866,99,3607,409,20611,1589,124905,6601,826121, 37581]