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A297515 as a simple table

n a(n)
1 4
2 33
3 128
4 624
5 3383
6 16173
7 80436
8 406779
9 2013490
10 10037118
11 50164575
12 249805967
13 1245550598
14 6212873729
15 30971037656
16 154425242048
17 770028394901
18 3839281512465
19 19143040999144
20 95449950894167
21 475918812028350

[4,33,128,624,3383,16173,80436,406779,2013490,
 10037118,50164575,249805967,1245550598,6212873729,
 30971037656,154425242048,770028394901,
 3839281512465,19143040999144,95449950894167,
 475918812028350]

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Last modified September 24 22:14 EDT 2023. Contains 365582 sequences. (Running on oeis4.)