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A175104 as a simple table

n a(n)
1 1
2 2
3 4
4 9
5 20
6 43
7 89
8 181
9 365
10 734
11 1473
12 2952
13 5911
14 11830
15 23669
16 47347
17 94704
18 189419
19 378850
20 757713
21 1515440
22 3030895
23 6061806
24 12123629
25 24247276
26 48494571
27 96989162
28 193978345
29 387956712
30 775913447
31 1551826917
32 3103653858

[1,2,4,9,20,43,89,181,365,734,1473,2952,5911,
 11830,23669,47347,94704,189419,378850,757713,
 1515440,3030895,6061806,12123629,24247276,
 48494571,96989162,193978345,387956712,775913447,
 1551826917,3103653858]

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Last modified January 19 20:33 EST 2019. Contains 319310 sequences. (Running on oeis4.)