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A261367
as a simple table
n
a(n)
0
1
1
1
2
1
3
1
4
1
5
2
6
4
7
9
8
24
9
52
10
165
11
555
12
2020
[1,1,1,1,1,2,4,9,24,52,165,555,2020]
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Last modified April 25 04:42 EDT 2024. Contains 371964 sequences. (Running on oeis4.)