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A324590 as a simple table

na(n)
01
12
21080
316133644800
4139256878046022696960000
56288402750181849898716908922601472000000000
68322157105451357856813375261666887975745751468393837363200000000000000

[1,2,1080,16133644800,139256878046022696960000,
 6288402750181849898716908922601472000000000,
 83221571054513578568133752616668879757457514683938\
 37363200000000000000]