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A193154 as a simple table

na(n)
21
33
4384
52048000
6518400000000
77192939211224252416
86266608900058816862941609984
9388040545518272905743826242144898646016
101911283738799704422875920401026220178381209600000000

[1,3,384,2048000,518400000000,7192939211224252416,
 6266608900058816862941609984,
 388040545518272905743826242144898646016,
 19112837387997044228759204010262201783812096000000\
 00]