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A009589
as a simple table
n
a(n)
1
1
2
2
3
3
4
5
5
11
6
26
7
92
8
378
9
2238
10
20760
11
334080
[1,2,3,5,11,26,92,378,2238,20760,334080]
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Last modified April 24 09:18 EDT 2024. Contains 371935 sequences. (Running on oeis4.)