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A004384 as a simple table

na(n)
31
432
5780
617296
7367290
87624512
9156238908
103176716400
1164276915527
121296543270880
1326100986351440
14524780754733872
1510542859559688820
16211709328983644800
174250305029168216000
1885323087086516197776

[1,32,780,17296,367290,7624512,156238908,
 3176716400,64276915527,1296543270880,
 26100986351440,524780754733872,10542859559688820,
 211709328983644800,4250305029168216000,
 85323087086516197776]