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A035084 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
10 273
11 676
12 1694
13 4296
14 10991
15 28350
16 73614
17 192327
18 505093
19 1332801
20 3531598
21 9393501
22 25070735
23 67121670
24 180216260
25 485133376
26 1309101329
27 3540394176
28 9594562328
29 26051397890
30 70861839620

[0,0,1,1,2,4,9,20,47,112,273,676,1694,4296,10991,
 28350,73614,192327,505093,1332801,3531598,9393501,
 25070735,67121670,180216260,485133376,1309101329,
 3540394176,9594562328,26051397890,70861839620]

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Last modified February 26 01:41 EST 2020. Contains 332270 sequences. (Running on oeis4.)