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A152638 as a simple table

na(n)
11
22
36
424
5120
6720
75040
840320
9341760
103129408
1131267872
12336706304
133892760640
1448256123072
15654140524488
169444036425220

[1,2,6,24,120,720,5040,40320,341760,3129408,
 31267872,336706304,3892760640,48256123072,
 654140524488,9444036425220]