A017986 - OEIS

A017986 as a simple table

n	a(n)
0	1
1	2
2	3
3	4
4	6
5	10
6	16
7	25
8	40
9	64
10	102
11	161
12	256
13	406
14	645
15	1024
16	1625
17	2580
18	4096
19	6502
20	10321
21	16384
22	26008
23	41285
24	65536
25	104032
26	165140
27	262144
28	416128
29	660561
30	1048576
31	1664511
32	2642246
33	4194304
34	6658043
35	10568984
36	16777216
37	26632170
38	42275935

[1,2,3,4,6,10,16,25,40,64,102,161,256,406,645, 1024,1625,2580,4096,6502,10321,16384,26008,41285, 65536,104032,165140,262144,416128,660561,1048576, 1664511,2642246,4194304,6658043,10568984,16777216, 26632170,42275935]