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A001644 as a simple table

n a(n)
0 3
1 1
2 3
3 7
4 11
5 21
6 39
7 71
8 131
9 241
10 443
11 815
12 1499
13 2757
14 5071
15 9327
16 17155
17 31553
18 58035
19 106743
20 196331
21 361109
22 664183
23 1221623
24 2246915
25 4132721
26 7601259
27 13980895
28 25714875
29 47297029
30 86992799
31 160004703
32 294294531
33 541292033
34 995591267
35 1831177831

[3,1,3,7,11,21,39,71,131,241,443,815,1499,2757,
 5071,9327,17155,31553,58035,106743,196331,361109,
 664183,1221623,2246915,4132721,7601259,13980895,
 25714875,47297029,86992799,160004703,294294531,
 541292033,995591267,1831177831]

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Last modified April 16 07:59 EDT 2021. Contains 343030 sequences. (Running on oeis4.)