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A018157 as a simple table

n a(n)
0 1
1 2
2 3
3 5
4 9
5 15
6 26
7 44
8 76
9 131
10 225
11 387
12 665
13 1142
14 1964
15 3375
16 5801
17 9970
18 17137
19 29454
20 50625
21 87013
22 149555
23 257051
24 441813
25 759375
26 1305192
27 2243328
28 3855769
29 6627188
30 11390625
31 19577886
32 33649922

[1,2,3,5,9,15,26,44,76,131,225,387,665,1142,1964,
 3375,5801,9970,17137,29454,50625,87013,149555,
 257051,441813,759375,1305192,2243328,3855769,
 6627188,11390625,19577886,33649922]

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Last modified September 20 23:04 EDT 2021. Contains 347596 sequences. (Running on oeis4.)