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A247471 as a simple table

n a(n)
0 0
1 0
2 0
3 1
4 1
5 2
6 5
7 11
8 26
9 62
10 148
11 356
12 860
13 2085
14 5073
15 12382
16 30309
17 74391
18 183042
19 451427
20 1115741
21 2763228
22 6856327
23 17042633
24 42433166
25 105816857
26 264268595
27 660908408
28 1655040445
29 4149700172
30 10416866219
31 26178412875
32 65858360172
33 165850637772

[0,0,0,1,1,2,5,11,26,62,148,356,860,2085,5073,
 12382,30309,74391,183042,451427,1115741,2763228,
 6856327,17042633,42433166,105816857,264268595,
 660908408,1655040445,4149700172,10416866219,
 26178412875,65858360172,165850637772]

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Last modified August 4 06:58 EDT 2020. Contains 336201 sequences. (Running on oeis4.)