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A018086 as a simple table

n a(n)
0 1
1 2
2 4
3 8
4 14
5 28
6 53
7 102
8 196
9 380
10 734
11 1419
12 2744
13 5308
14 10268
15 19861
16 38416
17 74310
18 143740
19 278041
20 537824
21 1040333
22 2012354
23 3892568
24 7529536
25 14564656
26 28172944
27 54495952
28 105413504
29 203905180

[1,2,4,8,14,28,53,102,196,380,734,1419,2744,5308,
 10268,19861,38416,74310,143740,278041,537824,
 1040333,2012354,3892568,7529536,14564656,28172944,
 54495952,105413504,203905180]

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Last modified September 21 14:08 EDT 2021. Contains 347598 sequences. (Running on oeis4.)