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A058386 as a simple table

n a(n)
0 0
1 0
2 1
3 1
4 2
5 4
6 9
7 20
8 47
9 112
10 274
11 678
12 1709
13 4346
14 11176
15 28966
16 75656
17 198814
18 525496
19 1395758
20 3723986
21 9975314
22 26817655
23 72332320
24 195679137
25 530814386
26 1443556739
27 3934880554
28 10748839215
29 29420919456
30 80678144437
31 221618678694

[0,0,1,1,2,4,9,20,47,112,274,678,1709,4346,11176,
 28966,75656,198814,525496,1395758,3723986,9975314,
 26817655,72332320,195679137,530814386,1443556739,
 3934880554,10748839215,29420919456,80678144437,
 221618678694]

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Last modified February 17 02:22 EST 2020. Contains 331976 sequences. (Running on oeis4.)