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A248812 as a simple table

na(n)
01
11
22
32
424
524
6720
7720
840320
940320
103628800
113628800
12479001600
13479001600
1487178291200
1587178291200
1620922789888000
1720922789888000
186402373705728000
196402373705728000
202432902008176640000
212432902008176640000
221124000727777607680000

[1,1,2,2,24,24,720,720,40320,40320,3628800,
 3628800,479001600,479001600,87178291200,
 87178291200,20922789888000,20922789888000,
 6402373705728000,6402373705728000,
 2432902008176640000,2432902008176640000,
 1124000727777607680000]