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A027235 as a simple table

n a(n)
0 1
1 3
2 8
3 22
4 53
5 138
6 317
7 803
8 1794
9 4478
10 9823
11 24321
12 52662
13 129815
14 278365
15 684689
16 1457113
17 3581074
18 7574863
19 18616678
20 39182980
21 96351078
22 201947877
23 497006898
24 1038017513
25 2557192089
26 5324505911
27 13131212951
28 27268815916

[1,3,8,22,53,138,317,803,1794,4478,9823,24321,
 52662,129815,278365,684689,1457113,3581074,
 7574863,18616678,39182980,96351078,201947877,
 497006898,1038017513,2557192089,5324505911,
 13131212951,27268815916]

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Last modified September 18 15:44 EDT 2021. Contains 347527 sequences. (Running on oeis4.)