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A224103 as a simple table

na(n)
01
18
2216
3576
4108000
543200
614817600
716934400
8571536000
9127008000
10101428588800
1118441561600
12709031939616000
131731457728000
14373994869248
1524932991283200
16229679599076928000
17491293260057600

[1,8,216,576,108000,43200,14817600,16934400,
 571536000,127008000,101428588800,18441561600,
 709031939616000,1731457728000,373994869248,
 24932991283200,229679599076928000,491293260057600]