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A060871 as a simple table

na(n)
16
2384
319494
4960000
547073606
62306841984
7113036904294
85538819840000
9271402252867206
1013298710955443584
11651636840771389094
1231930205225480640000
131564580056242329380806
1476664422757230585805184

[6,384,19494,960000,47073606,2306841984,
 113036904294,5538819840000,271402252867206,
 13298710955443584,651636840771389094,
 31930205225480640000,1564580056242329380806,
 76664422757230585805184]