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A206000 as a simple table

n a(n)
0 1
1 0
2 0
3 1
4 2
5 6
6 15
7 40
8 110
9 303
10 853
11 2419
12 6950
13 20110
14 58677
15 172267
16 508825
17 1510472
18 4504978
19 13491155
20 40554394
21 122318519
22 370075767
23 1122830663
24 3415591776
25 10414918850
26 31827804005
27 97464863424
28 299032201886
29 919094334980
30 2829593105751
31 8724968220133
32 26942517476931
33 83312297368383

[1,0,0,1,2,6,15,40,110,303,853,2419,6950,20110,
 58677,172267,508825,1510472,4504978,13491155,
 40554394,122318519,370075767,1122830663,
 3415591776,10414918850,31827804005,97464863424,
 299032201886,919094334980,2829593105751,
 8724968220133,26942517476931,83312297368383]

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Last modified February 24 03:22 EST 2020. Contains 332195 sequences. (Running on oeis4.)