A145966 - OEIS

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A145966 as a simple table

n	a(n)
1	1
2	1
3	1
4	1
5	9
6	1
7	16
8	1
9	49
10	1
11	384
12	25
13	3677
14	173
15	58365
16	1794
17	1326578
18	20685
19	34318014
20	319727
21	1264197446
22	6676539
23	64169954075
24	232552310

[1,1,1,1,9,1,16,1,49,1,384,25,3677,173,58365,1794, 1326578,20685,34318014,319727,1264197446,6676539, 64169954075,232552310]