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A166338 as a simple table

na(n)
01
124
220160
379833600
4871782912000
520274183401472000
6861733891296165888000
760493719168990845337600000
86526062423950732395020288000000
91025113885554181044609786839040000000

[1,24,20160,79833600,871782912000,
 20274183401472000,861733891296165888000,
 60493719168990845337600000,
 6526062423950732395020288000000,
 1025113885554181044609786839040000000]