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A183977 as a simple table

n a(n)
1 4
2 8
3 14
4 26
5 46
6 86
7 158
8 302
9 574
10 1118
11 2174
12 4286
13 8446
14 16766
15 33278
16 66302
17 132094
18 263678 

[4,8,14,26,46,86,158,302,574,1118,2174,4286,8446,
 16766,33278,66302,132094,263678]

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Last modified October 2 05:37 EDT 2023. Contains 365831 sequences. (Running on oeis4.)