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A057527 as a simple table

na(n)
01
11
22
348
4331776
579254226206720
6471092427871945743012986880000
7351177419973413722592573060611594181593855426560000000000

[1,1,2,48,331776,79254226206720,
 471092427871945743012986880000,
 35117741997341372259257306061159418159385542656000\
 0000000]