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A051841 as a simple table

n a(n)
1 1
2 0
3 1
4 1
5 3
6 4
7 9
8 14
9 28
10 48
11 93
12 165
13 315
14 576
15 1091
16 2032
17 3855
18 7252
19 13797
20 26163
21 49929
22 95232
23 182361
24 349350
25 671088
26 1290240
27 2485504
28 4792905
29 9256395
30 17894588
31 34636833
32 67106816
33 130150493
34 252641280
35 490853403
36 954429840
37 1857283155
38 3616800768
39 7048151355
40 13743869130
41 26817356775

[1,0,1,1,3,4,9,14,28,48,93,165,315,576,1091,2032,
 3855,7252,13797,26163,49929,95232,182361,349350,
 671088,1290240,2485504,4792905,9256395,17894588,
 34636833,67106816,130150493,252641280,490853403,
 954429840,1857283155,3616800768,7048151355,
 13743869130,26817356775]

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Last modified September 20 19:48 EDT 2020. Contains 337265 sequences. (Running on oeis4.)