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A001816 as a simple table

na(n)
012
1120
2720
33360
413440
548384
6161280
7506880
81520640
94392960
1012300288
1133546240
1289456640
13233963520
14601620480
151524105216
163810263040
179413591040
1823011000320
1955710842880
20133706022912
21318347673600
22752458137600
231766640844800
244122161971200

[12,120,720,3360,13440,48384,161280,506880,
 1520640,4392960,12300288,33546240,89456640,
 233963520,601620480,1524105216,3810263040,
 9413591040,23011000320,55710842880,133706022912,
 318347673600,752458137600,1766640844800,
 4122161971200]