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A005256 as a simple table

n a(n)
1 1
2 3
3 6
4 12
5 23
6 45
7 87
8 171
9 336
10 666
11 1320
12 2628
13 5233
14 10443
15 20841
16 41637
17 83187
18 166287
19 332403
20 664635
21 1328934
22 2657532
23 5314398
24 10628130
25 21254940
26 42508560
27 85014492
28 170026356
29 340047479
30 680089725
31 1360169007
32 2720327571

[1,3,6,12,23,45,87,171,336,666,1320,2628,5233,
 10443,20841,41637,83187,166287,332403,664635,
 1328934,2657532,5314398,10628130,21254940,
 42508560,85014492,170026356,340047479,680089725,
 1360169007,2720327571]

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Last modified October 17 01:03 EDT 2019. Contains 328103 sequences. (Running on oeis4.)