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A081659 as a simple table

n a(n)
0 1
1 2
2 4
3 6
4 9
5 13
6 19
7 28
8 42
9 64
10 99
11 155
12 245
13 390
14 624
15 1002
16 1613
17 2601
18 4199
19 6784
20 10966
21 17732
22 28679
23 46391
24 75049
25 121418
26 196444
27 317838
28 514257
29 832069
30 1346299
31 2178340
32 3524610
33 5702920
34 9227499
35 14930387
36 24157853
37 39088206

[1,2,4,6,9,13,19,28,42,64,99,155,245,390,624,1002,
 1613,2601,4199,6784,10966,17732,28679,46391,75049,
 121418,196444,317838,514257,832069,1346299,
 2178340,3524610,5702920,9227499,14930387,24157853,
 39088206]

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Last modified July 10 00:05 EDT 2020. Contains 335570 sequences. (Running on oeis4.)