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A097926 as a simple table

n a(n)
5 18
6 36
7 70
8 134
9 258
10 498
11 960
12 1850
13 3566
14 6874
15 13250
16 25540
17 49230
18 94894
19 182914
20 352578
21 679616
22 1310002
23 2525110
24 4867306
25 9382034
26 18084452
27 34858902
28 67192694
29 129518082
30 249654130
31 481223808
32 927588714
33 1787984734
34 3446451386

[18,36,70,134,258,498,960,1850,3566,6874,13250,
 25540,49230,94894,182914,352578,679616,1310002,
 2525110,4867306,9382034,18084452,34858902,
 67192694,129518082,249654130,481223808,927588714,
 1787984734,3446451386]

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Last modified September 28 08:33 EDT 2020. Contains 337394 sequences. (Running on oeis4.)