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A174197 as a simple table

na(n)
14
26
324
430
5720
6168
7720
82520
9151200
1055440
11665280
121310400
1347520
14454053600
152471040
163598560
174410806400
181769644800
19801964800
201150269120
212283240960

[4,6,24,30,720,168,720,2520,151200,55440,665280,
 1310400,47520,454053600,2471040,3598560,
 4410806400,1769644800,801964800,1150269120,
 2283240960]