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A303833 as a simple table

n a(n)
1 0
2 1
3 2
4 6
5 15
6 43
7 116
8 329
9 918
10 2609
11 7391
12 21099
13 60248
14 172683
15 495509
16 1424937
17 4102693
18 11830006
19 34148859
20 98686001
21 285459772
22 826473782
23 2394774727
24 6944343654
25 20151175658
26 58513084011
27 170007600051
28 494230862633

[0,1,2,6,15,43,116,329,918,2609,7391,21099,60248,
 172683,495509,1424937,4102693,11830006,34148859,
 98686001,285459772,826473782,2394774727,
 6944343654,20151175658,58513084011,170007600051,
 494230862633]

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Last modified March 4 23:52 EST 2021. Contains 341812 sequences. (Running on oeis4.)