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A026643 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 8
5 13
6 26
7 46
8 92
9 166
10 332
11 610
12 1220
13 2269
14 4538
15 8518
16 17036
17 32206
18 64412
19 122464
20 244928
21 467842
22 935684
23 1794196
24 3588392
25 6903352
26 13806704
27 26635774
28 53271548
29 103020253
30 206040506
31 399300166
32 798600332

[1,1,2,4,8,13,26,46,92,166,332,610,1220,2269,4538,
 8518,17036,32206,64412,122464,244928,467842,
 935684,1794196,3588392,6903352,13806704,26635774,
 53271548,103020253,206040506,399300166,798600332]

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Last modified August 12 07:38 EDT 2020. Contains 336438 sequences. (Running on oeis4.)