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A108400 as a simple table

na(n)
01
12
216
3768
4294912
51132462080
652183852646400
733664847019245568000
8347485857744891213250560000
964560982045934655213753964953600000
10239901585047846581083822477336190648320000000

[1,2,16,768,294912,1132462080,52183852646400,
 33664847019245568000,347485857744891213250560000,
 64560982045934655213753964953600000,
 239901585047846581083822477336190648320000000]