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A225108 as a simple table

n a(n)
1 1
2 2
3 8
4 42
5 288
6 2280
7 21600
8 226800
9 2701440
10 35199360
11 504403200
12 7783776000
13 130288435200
14 2322678758400
15 44286571929600
16 894449267712000
17 19144352747520000
18 431093162852352000
19 10224590808047616000
20 253873324553232384000
21 6602896050191400960000

[1,2,8,42,288,2280,21600,226800,2701440,35199360,
 504403200,7783776000,130288435200,2322678758400,
 44286571929600,894449267712000,19144352747520000,
 431093162852352000,10224590808047616000,
 253873324553232384000,6602896050191400960000]

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Last modified April 23 15:20 EDT 2024. Contains 371916 sequences. (Running on oeis4.)