A146266 - OEIS

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A146266 as a simple table

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	10
8	5
9	44
10	17
11	490
12	45
13	3832
14	281
15	72349
16	4672
17	1945156
18	78267
19	77811492
20	1571678
21	4162726786
22	52679419
23	355835905036
24	3071977536
25	44996289731531
26	240721783237

[1,1,1,1,1,1,10,5,44,17,490,45,3832,281,72349, 4672,1945156,78267,77811492,1571678,4162726786, 52679419,355835905036,3071977536,44996289731531, 240721783237]