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A257593 as a simple table

n a(n)
3 2
4 4
5 10
6 18
7 46
8 100
9 204
10 420
11 840
12 1708
13 3478
14 7066
15 14286
16 28772

[2,4,10,18,46,100,204,420,840,1708,3478,7066,
 14286,28772]

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Last modified April 18 20:26 EDT 2024. Contains 371781 sequences. (Running on oeis4.)