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A290279
as a simple table
n
a(n)
0
1
1
1
2
2
3
6
4
22
5
110
6
628
7
4396
8
34496
9
309230
10
3069808
[1,1,2,6,22,110,628,4396,34496,309230,3069808]
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Last modified September 5 20:11 EDT 2024. Contains 375700 sequences. (Running on oeis4.)