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A174727 as a simple table

na(n)
02
16
28
3180
4288
510080
617280
7453600
8806400
947900160
1087091200
11217945728000
12402361344000
132241727488000
144184557977600
152000741783040000
163766102179840000
172838385676206080000
185377993912811520000
191686001091666411520000
203211430650793164800000
21423033001181754163200000

[2,6,8,180,288,10080,17280,453600,806400,47900160,
 87091200,217945728000,402361344000,2241727488000,
 4184557977600,2000741783040000,3766102179840000,
 2838385676206080000,5377993912811520000,
 1686001091666411520000,3211430650793164800000,
 423033001181754163200000]