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A152368 as a simple table

na(n)
11
22
36
424
5120
6720
74416
830744
9239856
102139504
1119700808
12202858542
132208308468
1425994725052
15324119733220
164313917683752

[1,2,6,24,120,720,4416,30744,239856,2139504,
 19700808,202858542,2208308468,25994725052,
 324119733220,4313917683752]