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A026621 as a simple table

n a(n)
0 1
1 1
2 3
3 5
4 10
5 17
6 34
7 60
8 120
9 217
10 434
11 798
12 1596
13 2970
14 5940
15 11154
16 22308
17 42185
18 84370
19 160446
20 320892
21 613054
22 1226108
23 2351440
24 4702880
25 9048522
26 18097044
27 34916300
28 69832600
29 135059220
30 270118440
31 523521630
32 1047043260

[1,1,3,5,10,17,34,60,120,217,434,798,1596,2970,
 5940,11154,22308,42185,84370,160446,320892,613054,
 1226108,2351440,4702880,9048522,18097044,34916300,
 69832600,135059220,270118440,523521630,1047043260]

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Last modified June 27 22:27 EDT 2022. Contains 354899 sequences. (Running on oeis4.)