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A189394 as a simple table

na(n)
11
22
36
412
560
6360
71260
82520
95040
1055440
11277200
12720720
133603600
1461261200
152205403200
16293318625600
176746328388800
18195643523275200

[1,2,6,12,60,360,1260,2520,5040,55440,277200,
 720720,3603600,61261200,2205403200,293318625600,
 6746328388800,195643523275200]