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A089423 as a simple table

na(n)
01
11
22
36
412
5120
6120
7840
8840
95040
105040
1155440
1255440
13720720
14720720
15720720
16720720
1724504480
1824504480
19465585120
20465585120

[1,1,2,6,12,120,120,840,840,5040,5040,55440,55440,
 720720,720720,720720,720720,24504480,24504480,
 465585120,465585120]