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A218020 as a simple table

n a(n)
0 0
1 1
2 1
3 1
4 1
5 2
6 3
7 5
8 8
9 14
10 23
11 40
12 69
13 121
14 212
15 378
16 672
17 1208
18 2177
19 3946
20 7173
21 13104
22 23995
23 44103
24 81261
25 150149
26 278054
27 516141
28 959952
29 1788950
30 3339656
31 6245177
32 11696510
33 21938857
34 41206395
35 77496891
36 145926374
37 275098857
38 519181163
39 980848600

[0,1,1,1,1,2,3,5,8,14,23,40,69,121,212,378,672,
 1208,2177,3946,7173,13104,23995,44103,81261,
 150149,278054,516141,959952,1788950,3339656,
 6245177,11696510,21938857,41206395,77496891,
 145926374,275098857,519181163,980848600]

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Last modified April 15 10:49 EDT 2021. Contains 342977 sequences. (Running on oeis4.)