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A183980 as a simple table

n a(n)
1 9
2 11
3 14
4 20
5 30
6 50
7 86
8 158
9 294
10 566
11 1094
12 2150
13 4230
14 8390
15 16646
16 33158
17 66054
18 131846
19 263174
20 525830
21 1050630
22 2100230
23 4198406
24 8394758
25 16785414
26 33566726
27 67125254
28 134242310
29 268468230
30 536920070
31 1073807366
32 2147581958
33 4295098374

[9,11,14,20,30,50,86,158,294,566,1094,2150,4230,
 8390,16646,33158,66054,131846,263174,525830,
 1050630,2100230,4198406,8394758,16785414,33566726,
 67125254,134242310,268468230,536920070,1073807366,
 2147581958,4295098374]

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Last modified April 24 11:21 EDT 2024. Contains 371936 sequences. (Running on oeis4.)