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A034866 as a simple table

na(n)
44
560
6720
77560
880640
9907200
1010886400
11139708800
121916006400
1328021593600
14435891456000
157192209024000
16125536739328000
172311968282624000
1844816615940096000
19912338253066240000

[4,60,720,7560,80640,907200,10886400,139708800,
 1916006400,28021593600,435891456000,7192209024000,
 125536739328000,2311968282624000,
 44816615940096000,912338253066240000]