A321577 - OEIS

A321577 as a simple table

n	a(n)
1	0
2	2
3	5
4	2
5	5
6	17
7	5
8	2
9	257
10	17
11	5
12	17
13	5
14	17
15	257
16	2
17	5
18	1025
19	5
20	65537
21	257
22	17
23	5
24	65537
25	129
26	17
27	67108865
28	65537
29	5
30	17
31	5
32	2
33	257
34	17
35	262145
36	268435457
37	5
38	17
39	257
40	65537
41	5
42	4194305
43	5
44	65537
45	131073
46	17
47	5
48	65537
49	1073741825
50	16777217
51	257
52	65537
53	5

[0,2,5,2,5,17,5,2,257,17,5,17,5,17,257,2,5,1025,5, 65537,257,17,5,65537,129,17,67108865,65537,5,17,5, 2,257,17,262145,268435457,5,17,257,65537,5, 4194305,5,65537,131073,17,5,65537,1073741825, 16777217,257,65537,5]