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A123457 as a simple table

n a(n)
1 1
2 2
3 4
4 11
5 33
6 147
7 896
8 8677
9 130114
10 2951360

[1,2,4,11,33,147,896,8677,130114,2951360]

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Last modified February 4 04:05 EST 2023. Contains 360045 sequences. (Running on oeis4.)