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A189848 as a simple table

na(n)
11
22
36
424
5120
6720
74920
837488
9319644
103033264
1131784280
12364902480
134509620040
1459768680032
15847746532152

[1,2,6,24,120,720,4920,37488,319644,3033264,
 31784280,364902480,4509620040,59768680032,
 847746532152]