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A109509 as a simple table

n a(n)
0 1
1 0
2 1
3 1
4 3
5 4
6 9
7 14
8 28
9 47
10 88
11 152
12 279
13 486
14 876
15 1539
16 2744
17 4824
18 8551
19 15023
20 26503
21 46509
22 81747
23 143210
24 251007
25 438915
26 767403
27 1339487
28 2336955
29 4071906
30 7090589
31 12333894
32 21440241
33 37235775
34 64624267
35 112067176
36 194209732
37 336313393
38 582019000

[1,0,1,1,3,4,9,14,28,47,88,152,279,486,876,1539,
 2744,4824,8551,15023,26503,46509,81747,143210,
 251007,438915,767403,1339487,2336955,4071906,
 7090589,12333894,21440241,37235775,64624267,
 112067176,194209732,336313393,582019000]

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Last modified January 15 20:47 EST 2019. Contains 319184 sequences. (Running on oeis4.)