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A089412
as a simple table
n
a(n)
0
1
1
1
2
2
3
5
4
18
5
84
6
2793
7
211123440
8
140826255570
9
213340617315
10
156232599082560
[1,1,2,5,18,84,2793,211123440,140826255570, 213340617315,156232599082560]
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Last modified April 23 22:36 EDT 2024. Contains 371917 sequences. (Running on oeis4.)
