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A323491 as a simple table

na(n)
01
12
224
3720
44480
53628800
668428800
7118609920
820922789888000
96402373705728000
10115852476579840000
111124000727777607680000
121909072005333044428800
131148978521728221184000000
1412195533784468554420060160000
1553050571962438211727261696000000
167973661725263440308097515520000000

[1,2,24,720,4480,3628800,68428800,118609920,
 20922789888000,6402373705728000,
 115852476579840000,1124000727777607680000,
 1909072005333044428800,1148978521728221184000000,
 12195533784468554420060160000,
 53050571962438211727261696000000,
 7973661725263440308097515520000000]