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A018909 as a simple table

n a(n)
0 3
1 6
2 13
3 29
4 65
5 146
6 328
7 737
8 1657
9 3726
10 8379
11 18843
12 42375
13 95295
14 214305
15 481942
16 1083821
17 2437364
18 5481296
19 12326680
20 27721007
21 62340730
22 140195723
23 315280889
24 709023335
25 1594495915
26 3585801902
27 8063975053
28 18134770251
29 40782602860
30 91714461944

[3,6,13,29,65,146,328,737,1657,3726,8379,18843,
 42375,95295,214305,481942,1083821,2437364,5481296,
 12326680,27721007,62340730,140195723,315280889,
 709023335,1594495915,3585801902,8063975053,
 18134770251,40782602860,91714461944]

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)