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A163012 as a simple table

n a(n)
1 3
2 16
3 82
4 416
5 2103
6 10633
7 53767
8 271882
9 1374808
10 6951884
11 35153031
12 177755487
13 898841773
14 4545100350
15 22982840520
16 116215466582
17 587657328849
18 2971559176087
19 15026042394605
20 75980970481664
21 384206813990810

[3,16,82,416,2103,10633,53767,271882,1374808,
 6951884,35153031,177755487,898841773,4545100350,
 22982840520,116215466582,587657328849,
 2971559176087,15026042394605,75980970481664,
 384206813990810]

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Last modified September 21 12:03 EDT 2021. Contains 347598 sequences. (Running on oeis4.)