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A354303 as a simple table

n a(n)
0 1
1 1
2 4
3 18
4 576
5 2400
6 518400
7 12700800
8 541900800
9 65840947200
10 13168189440000
11 88519495680000
12 229442532802560000
13 19387894021816320000
14 2533351485517332480000
15 855006126362099712000000
16 437763136697395052544000000
17 1621968544942912438272000000

[1,1,4,18,576,2400,518400,12700800,541900800,
 65840947200,13168189440000,88519495680000,
 229442532802560000,19387894021816320000,
 2533351485517332480000,855006126362099712000000,
 437763136697395052544000000,
 1621968544942912438272000000]

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Last modified July 9 23:25 EDT 2024. Contains 374191 sequences. (Running on oeis4.)