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A000996 as a simple table

n a(n)
0 1
1 0
2 0
3 1
4 1
5 1
6 2
7 6
8 17
9 44
10 112
11 304
12 918
13 3040
14 10623
15 38161
16 140074
17 528594
18 2068751
19 8436893
20 35813251
21 157448068
22 713084042
23 3315414747
24 15805117878
25 77273097114
26 387692392570
27 1996280632656
28 10542604575130
29 57034787751655
30 315649657181821

[1,0,0,1,1,1,2,6,17,44,112,304,918,3040,10623,
 38161,140074,528594,2068751,8436893,35813251,
 157448068,713084042,3315414747,15805117878,
 77273097114,387692392570,1996280632656,
 10542604575130,57034787751655,315649657181821]

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Last modified May 7 09:38 EDT 2024. Contains 372302 sequences. (Running on oeis4.)