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A120087 as a simple table

n a(n)
0 1
1 5
2 18
3 1
4 1440
5 1
6 75600
7 1
8 3628800
9 1
10 167650560
11 1
12 5230697472000
13 1
14 336259123200
15 1
16 53353114214400000
17 1
18 28100018194440192000
19 1
20 4817145976189747200000
21 1
22 91657150256046735360000
23 1

[1,5,18,1,1440,1,75600,1,3628800,1,167650560,1,
 5230697472000,1,336259123200,1,53353114214400000,
 1,28100018194440192000,1,4817145976189747200000,1,
 91657150256046735360000,1]

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Last modified April 18 22:18 EDT 2024. Contains 371782 sequences. (Running on oeis4.)