A265481 - OEIS

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A265481 as a simple table

n	a(n)
1	1
2	2
3	3
4	6
5	7
6	20
7	35
8	36
9	140
10	523
11	1170
12	1731
13	1842
14	3727
15	3886
16	9270
17	11071
18	13823
19	14451
20	27086
21	27606
22	31876
23	78008

[1,2,3,6,7,20,35,36,140,523,1170,1731,1842,3727, 3886,9270,11071,13823,14451,27086,27606,31876, 78008]