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A183437 as a simple table

n a(n)
1 4
2 28
3 89
4 361
5 1620
6 6392
7 26243
8 109483
9 447624
10 1841540
11 7595029
12 31226203
13 128506736
14 529054684
15 2177033731
16 8959709123
17 36876424418
18 151764857870
19 624602187635
20 2570631663169
21 10579647127402
22 43541564503936

[4,28,89,361,1620,6392,26243,109483,447624,
 1841540,7595029,31226203,128506736,529054684,
 2177033731,8959709123,36876424418,151764857870,
 624602187635,2570631663169,10579647127402,
 43541564503936]

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Last modified October 17 21:17 EDT 2021. Contains 348065 sequences. (Running on oeis4.)