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A239841 as a simple table

na(n)
01
11
24
330
4312
53720
664080
71305360
833949440
91019692800
1036360576000
111487539468800
1269633899596800
133649476307276800
14213929162589542400
1513848506938506240000
16986705192227442688000
1776724136092268048384000
186491471142159880740864000

[1,1,4,30,312,3720,64080,1305360,33949440,
 1019692800,36360576000,1487539468800,
 69633899596800,3649476307276800,
 213929162589542400,13848506938506240000,
 986705192227442688000,76724136092268048384000,
 6491471142159880740864000]