A147327 - OEIS

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A147327 as a simple table

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	6
10	1
11	28
12	9
13	150
14	25
15	1118
16	57
17	7823
18	349
19	97756
20	3222
21	1845246
22	35623
23	42655192
24	520596
25	1288627017
26	9629183

[1,1,1,1,1,1,1,1,6,1,28,9,150,25,1118,57,7823,349, 97756,3222,1845246,35623,42655192,520596, 1288627017,9629183]