A269722 - OEIS

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A269722 as a simple table

n	a(n)
1	1
2	2
3	2
4	6
5	8
6	6
7	24
8	30
9	42
10	24
11	120
12	116
13	216
14	264
15	120
16	720
17	532
18	1002
19	1920
20	1920
21	720
22	5040
23	2848
24	4626
25	11688
26	19200
27	15840
28	5040

[1,2,2,6,8,6,24,30,42,24,120,116,216,264,120,720, 532,1002,1920,1920,720,5040,2848,4626,11688,19200, 15840,5040]