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A329253 as a simple table

n a(n)
2 1
3 4
4 15
5 52
6 190
7 680
8 2495
9 9164
10 33980

[1,4,15,52,190,680,2495,9164,33980]

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Last modified March 28 05:02 EDT 2024. Contains 371235 sequences. (Running on oeis4.)