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A286209 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 0
5 0
6 1
7 3
8 10
9 24
10 60
11 134
12 304
13 656
14 1420
15 2996
16 6312
17 13112
18 27167
19 55825
20 114412
21 233282
22 474563
23 962159
24 1947098
25 3931288
26 7925708
27 15952866
28 32072580
29 64404708
30 129213082
31 259009006
32 518818124
33 1038549912
34 2077775396
35 4154785904
36 8304424080

[0,0,0,0,0,0,1,3,10,24,60,134,304,656,1420,2996,
 6312,13112,27167,55825,114412,233282,474563,
 962159,1947098,3931288,7925708,15952866,32072580,
 64404708,129213082,259009006,518818124,1038549912,
 2077775396,4154785904,8304424080]

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Last modified May 20 20:16 EDT 2019. Contains 323426 sequences. (Running on oeis4.)