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A237500 as a simple table

n a(n)
1 2
2 6
3 12
4 28
5 58
6 118
7 244
8 500
9 1004
10 2024
11 4070
12 8150
13 16340
14 32720
15 65450
16 130986
17 262056
18 524136
19 1048422
20 2096982
21 4194000
22 8388300
23 16776906 

[2,6,12,28,58,118,244,500,1004,2024,4070,8150,
 16340,32720,65450,130986,262056,524136,1048422,
 2096982,4194000,8388300,16776906]

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Last modified May 4 13:55 EDT 2024. Contains 372243 sequences. (Running on oeis4.)