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A120917 as a simple table

na(n)
01
14
232
3212
41504
510848
679696
7596160
84520000
934673940
10268538048
112096374656
1216475970896
13130234435648
141034568731408
158254368150320
1666112337392256
17531345216883584
184283682906179728
1934632004320564416

[1,4,32,212,1504,10848,79696,596160,4520000,
 34673940,268538048,2096374656,16475970896,
 130234435648,1034568731408,8254368150320,
 66112337392256,531345216883584,4283682906179728,
 34632004320564416]