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A133939 as a simple table

n a(n)
0 0
1 1
2 2
3 6
4 40
5 440
6 5952
7 97104
8 1888640
9 42480000
10 1082119680
11 30814080000
12 970187827200
13 33461288899584
14 1254539018571776
15 50803163905751040
16 2209862882578300928
17 102761280728930287616
18 5087062588875762696192
19 267101579060996713611264

[0,1,2,6,40,440,5952,97104,1888640,42480000,
 1082119680,30814080000,970187827200,
 33461288899584,1254539018571776,50803163905751040,
 2209862882578300928,102761280728930287616,
 5087062588875762696192,267101579060996713611264]

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Last modified August 17 19:02 EDT 2024. Contains 375227 sequences. (Running on oeis4.)