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A064290 as a simple table

n a(n)
1 1
2 3
3 6
4 13
5 20
6 43
7 62
8 113
9 224
10 367
11 494
12 833
13 1815
14 3379
15 5551
16 9169
17 17864
18 32978
19 58964
20 106218
21 131313
22 155719
23 180118
24 591890
25 881467
26 1345004
27 3012446
28 5728819
29 9309579
30 17512700
31 25641318
32 52978675
33 61998980
34 125130665
35 244636214
36 280766754
37 566273517
38 1031389697
39 2182394227
40 3045423658
41 3454917187

[1,3,6,13,20,43,62,113,224,367,494,833,1815,3379,
 5551,9169,17864,32978,58964,106218,131313,155719,
 180118,591890,881467,1345004,3012446,5728819,
 9309579,17512700,25641318,52978675,61998980,
 125130665,244636214,280766754,566273517,
 1031389697,2182394227,3045423658,3454917187]

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Last modified November 22 05:30 EST 2018. Contains 317453 sequences. (Running on oeis4.)