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A215411 as a simple table

n a(n)
0 0
1 0
2 1
3 2
4 5
5 10
6 21
7 42
8 84
9 169
10 338
11 677
12 1355
13 2710
14 5420
15 10841
16 21683
17 43366
18 86733
19 173467
20 346934
21 693869
22 1387738
23 2775476
24 5550953
25 11101907
26 22203814
27 44407629
28 88815258
29 177630516
30 355261033
31 710522066
32 1421044133
33 2842088266
34 5684176533

[0,0,1,2,5,10,21,42,84,169,338,677,1355,2710,5420,
 10841,21683,43366,86733,173467,346934,693869,
 1387738,2775476,5550953,11101907,22203814,
 44407629,88815258,177630516,355261033,710522066,
 1421044133,2842088266,5684176533]

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Last modified November 22 18:55 EST 2019. Contains 329410 sequences. (Running on oeis4.)