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A083484 as a simple table

na(n)
11
24
312
460
5420
62520
727720
8720720
9720720
1024504480
11465585120
122793510720
1364250746560
14642507465600
151927522396800
16111796299014400
173465685269446400
1820794111616678400
19727793906583744000

[1,4,12,60,420,2520,27720,720720,720720,24504480,
 465585120,2793510720,64250746560,642507465600,
 1927522396800,111796299014400,3465685269446400,
 20794111616678400,727793906583744000]