A375569 - OEIS

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A375569 as a simple table

n	a(n)
1	1
2	6
3	34
4	16
5	320
6	36
7	56
8	5556
9	20196
10	32210
11	88
12	121428
13	388284
14	224
15	1489960
16	12800
17	251464
18	2304
19	36784
20	73062090
21	29787744
22	738959760
23	73600
24	884736

[1,6,34,16,320,36,56,5556,20196,32210,88,121428, 388284,224,1489960,12800,251464,2304,36784, 73062090,29787744,738959760,73600,884736]