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A143383 as a simple table

na(n)
01
11
22
36
424
540
6240
7560
813440
9120960
10241920
11887040
12394240
13138378240
14276756480
15593049600
1666421555200
174136140800
18173717913600
1914302774886400
20171633298636800
21144171970854912
227208598542745600
23283414985441280

[1,1,2,6,24,40,240,560,13440,120960,241920,887040,
 394240,138378240,276756480,593049600,66421555200,
 4136140800,173717913600,14302774886400,
 171633298636800,144171970854912,7208598542745600,
 283414985441280]