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A055534 as a simple table

na(n)
31
486
52310
642960
7712320
811481120
9186671520
103116534400
1153907638400
12970417324800
1318217668268800

[1,86,2310,42960,712320,11481120,186671520,
 3116534400,53907638400,970417324800,
 18217668268800]