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A163087 as a simple table

na(n)
01
11
22
36
412
530
6240
7140
8840
93780
1015120
112772
12221760
1312012
14960960
159266400
1610810800
17218790
187351344000
19923780
2016761064320
213259095840
223910915008
2316224936
2441977154419200
252028117000
26249864014400

[1,1,2,6,12,30,240,140,840,3780,15120,2772,221760,
 12012,960960,9266400,10810800,218790,7351344000,
 923780,16761064320,3259095840,3910915008,16224936,
 41977154419200,2028117000,249864014400]