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A320397 as a simple table

n a(n)
1 4
2 28
3 142
4 732
5 3694
6 18754
7 94842
8 480321
9 2431390
10 12309913
11 62320210
12 315508545
13 1597316261
14 8086701105
15 40940363689
16 207267894413
17 1049330682760
18 5312423710470
19 26895092511498
20 136161202337290
21 689340370573277

[4,28,142,732,3694,18754,94842,480321,2431390,
 12309913,62320210,315508545,1597316261,8086701105,
 40940363689,207267894413,1049330682760,
 5312423710470,26895092511498,136161202337290,
 689340370573277]

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Last modified April 23 06:04 EDT 2024. Contains 371906 sequences. (Running on oeis4.)