A163403 - OEIS

A163403 as a simple table

n	a(n)
1	1
2	2
3	2
4	4
5	4
6	8
7	8
8	16
9	16
10	32
11	32
12	64
13	64
14	128
15	128
16	256
17	256
18	512
19	512
20	1024
21	1024
22	2048
23	2048
24	4096
25	4096
26	8192
27	8192
28	16384
29	16384
30	32768
31	32768
32	65536
33	65536
34	131072
35	131072
36	262144
37	262144
38	524288
39	524288
40	1048576
41	1048576
42	2097152
43	2097152

[1,2,2,4,4,8,8,16,16,32,32,64,64,128,128,256,256, 512,512,1024,1024,2048,2048,4096,4096,8192,8192, 16384,16384,32768,32768,65536,65536,131072,131072, 262144,262144,524288,524288,1048576,1048576, 2097152,2097152]