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A006867 as a simple table

n a(n)
4 1
5 2
6 5
7 20
8 107
9 826
10 7703
11 81231
12 914973
13 10772406

[1,2,5,20,107,826,7703,81231,914973,10772406]

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Last modified April 19 16:21 EDT 2024. Contains 371794 sequences. (Running on oeis4.)