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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.)