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A240558 as a simple table

na(n)
01
12
24
324
432
5320
6320
74480
83584
964512
1043008
11946176
12540672
1314057472
147028736
15210862080
1693716480
173186360320
181274544128
1948432676864
2017611882496
21739699064832
22246566354944
2311342052327424
243489862254592
25174493112729600
2649855175065600

[1,2,4,24,32,320,320,4480,3584,64512,43008,946176,
 540672,14057472,7028736,210862080,93716480,
 3186360320,1274544128,48432676864,17611882496,
 739699064832,246566354944,11342052327424,
 3489862254592,174493112729600,49855175065600]