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A219771 as a simple table

n a(n)
1 6
2 15
3 114
4 771
5 4837
6 27921
7 147717
8 725287
9 3342140
10 14569918
11 60328126
12 237879223
13 895542427
14 3227615841
15 11166814658
16 37186260684
17 119490688029
18 371363754669
19 1118694131688
20 3272799722189
21 9315261723895
22 25836710356888

[6,15,114,771,4837,27921,147717,725287,3342140,
 14569918,60328126,237879223,895542427,3227615841,
 11166814658,37186260684,119490688029,371363754669,
 1118694131688,3272799722189,9315261723895,
 25836710356888]

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Last modified August 11 10:15 EDT 2022. Contains 356065 sequences. (Running on oeis4.)