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A000021 as a simple table

n a(n)
0 1
1 1
2 2
3 2
4 6
5 9
6 17
7 30
8 54
9 98
10 183
11 341
12 645
13 1220
14 2327
15 4451
16 8555
17 16489
18 31859
19 61717
20 119779
21 232919
22 453584
23 884544
24 1727213
25 3376505
26 6607371
27 12942012
28 25371540
29 49777187
30 97731027
31 192010355
32 377475336
33 742512992
34 1461352025
35 2877572478
36 5668965407

[1,1,2,2,6,9,17,30,54,98,183,341,645,1220,2327,
 4451,8555,16489,31859,61717,119779,232919,453584,
 884544,1727213,3376505,6607371,12942012,25371540,
 49777187,97731027,192010355,377475336,742512992,
 1461352025,2877572478,5668965407]

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Last modified June 19 04:44 EDT 2019. Contains 324217 sequences. (Running on oeis4.)