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A258450 as a simple table

n a(n)
0 1
1 0
2 1
3 2
4 5
5 13
6 35
7 100
8 298
9 926
10 2995
11 10045
12 34871
13 125040
14 462283
15 1759340
16 6882479
17 27639252
18 113809750
19 479993898
20 2071411798
21 9138568984
22 41182104446
23 189418562699
24 888607018626
25 4248949407337
26 20695172225549
27 102617378820155
28 517728263280060

[1,0,1,2,5,13,35,100,298,926,2995,10045,34871,
 125040,462283,1759340,6882479,27639252,113809750,
 479993898,2071411798,9138568984,41182104446,
 189418562699,888607018626,4248949407337,
 20695172225549,102617378820155,517728263280060]

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)