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A045758
as a simple table
n
a(n)
0
1
1
20
2
200
3
1340
4
6800
5
29028
6
108120
7
355980
8
1047840
9
2793140
10
6830056
[1,20,200,1340,6800,29028,108120,355980,1047840, 2793140,6830056]
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Last modified September 12 07:57 EDT 2024. Contains 375850 sequences. (Running on oeis4.)