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A060497 as a simple table

na(n)
11
24
356
411440
5129024480
613136858812224
7614965786737727286400
823665616042362569982121184000
94818341997044953599090397918009939136000

[1,4,56,11440,129024480,13136858812224,
 614965786737727286400,
 23665616042362569982121184000,
 4818341997044953599090397918009939136000]