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A128209 as a simple table

n a(n)
0 1
1 2
2 2
3 4
4 6
5 12
6 22
7 44
8 86
9 172
10 342
11 684
12 1366
13 2732
14 5462
15 10924
16 21846
17 43692
18 87382
19 174764
20 349526
21 699052
22 1398102
23 2796204
24 5592406
25 11184812
26 22369622
27 44739244
28 89478486
29 178956972
30 357913942
31 715827884
32 1431655766
33 2863311532
34 5726623062

[1,2,2,4,6,12,22,44,86,172,342,684,1366,2732,5462,
 10924,21846,43692,87382,174764,349526,699052,
 1398102,2796204,5592406,11184812,22369622,
 44739244,89478486,178956972,357913942,715827884,
 1431655766,2863311532,5726623062]

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Last modified October 18 02:23 EDT 2019. Contains 328135 sequences. (Running on oeis4.)