A283843 - OEIS

A283843 as a simple table

n	a(n)
1	3
2	3
3	5
4	5
5	9
6	13
7	21
8	33
9	61
10	105
11	189
12	345
13	633
14	1173
15	2193
16	4097
17	7713
18	14573
19	27597
20	52433
21	99881
22	190653
23	364725
24	699073
25	1342185
26	2581113
27	4971069
28	9586985
29	18512793
30	35791473
31	69273669
32	134217729
33	260301177
34	505290273
35	981706833

[3,3,5,5,9,13,21,33,61,105,189,345,633,1173,2193, 4097,7713,14573,27597,52433,99881,190653,364725, 699073,1342185,2581113,4971069,9586985,18512793, 35791473,69273669,134217729,260301177,505290273, 981706833]