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A217889 as a simple table

n a(n)
1 1
2 3
3 11
4 45
5 197
6 903
7 4278
8 20788
9 103050
10 519268
11 2653278
12 13725388 

[1,3,11,45,197,903,4278,20788,103050,519268,
 2653278,13725388]

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Last modified April 23 11:35 EDT 2024. Contains 371912 sequences. (Running on oeis4.)