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A229751 as a simple table

n a(n)
1 3
2 422
3 2347
4 6561
5 15075
6 32548
7 69198
8 147376
9 315786
10 680124
11 1468934
12 3174760
13 6855906
14 14780020
15 31793694
16 68231136
17 146079674
18 312025516
19 665011638
20 1414360024
21 3002176530
22 6360776292
23 13453355726
24 28408158544
25 59894811114

[3,422,2347,6561,15075,32548,69198,147376,315786,
 680124,1468934,3174760,6855906,14780020,31793694,
 68231136,146079674,312025516,665011638,1414360024,
 3002176530,6360776292,13453355726,28408158544,
 59894811114]

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Last modified March 28 05:02 EDT 2024. Contains 371235 sequences. (Running on oeis4.)