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A232586 as a simple table

n a(n)
1 20
2 108
3 606
4 3002
5 14398
6 66950
7 306022
8 1382638
9 6200520
10 27671244
11 123093664
12 546418140
13 2422183000
14 10727201704
15 47478696368
16 210055317910
17 929074602120
18 4108554199540
19 18166666165648
20 80320554722730
21 355103563888676

[20,108,606,3002,14398,66950,306022,1382638,
 6200520,27671244,123093664,546418140,2422183000,
 10727201704,47478696368,210055317910,929074602120,
 4108554199540,18166666165648,80320554722730,
 355103563888676]

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)