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A002835 as a simple table

n a(n)
0 1
1 1
2 4
3 9
4 22
5 46
6 102
7 206
8 427
9 841
10 1658
11 3173
12 6038
13 11251
14 20807
15 37907
16 68493
17 122338
18 216819
19 380637
20 663417
21 1147033
22 1969961
23 3359677
24 5694592
25 9592063
26 16065593
27 26756430
28 44328414

[1,1,4,9,22,46,102,206,427,841,1658,3173,6038,
 11251,20807,37907,68493,122338,216819,380637,
 663417,1147033,1969961,3359677,5694592,9592063,
 16065593,26756430,44328414]

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Last modified September 29 17:14 EDT 2020. Contains 337432 sequences. (Running on oeis4.)