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A104004 as a simple table

n a(n)
0 1
1 3
2 7
3 16
4 35
5 75
6 158
7 329
8 679
9 1392
10 2839
11 5767
12 11678
13 23589
14 47555
15 95720
16 192427
17 386451
18 775486
19 1555153
20 3117071
21 6245088
22 12507887
23 25044431
24 50135230
25 100345485
26 200812363
27 401821144
28 803960099
29 1608434427
30 3217700894
31 6436748057

[1,3,7,16,35,75,158,329,679,1392,2839,5767,11678,
 23589,47555,95720,192427,386451,775486,1555153,
 3117071,6245088,12507887,25044431,50135230,
 100345485,200812363,401821144,803960099,
 1608434427,3217700894,6436748057]

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Last modified February 21 15:11 EST 2019. Contains 320374 sequences. (Running on oeis4.)