A307512 - cp's OEIS frontend

A307512 a(n) is the smallest k > 2^n such that 2^(k-1) == 1 (mod (2^n-1)*k).

n	a(n)
1	3
2	5
3	13
4	17
5	41
6	67
7	197
8	257
9	523
10	1031
11	2069
12	4129
13	8243
14	16451
15	32911
16	65537
17	131479
18	262153
19	524591
20	1048601
21	2097229
22	4194389
23	8388791
24	16777441
25	33554501
26	67108913
27	134217757
28	268435889
29	536871259
30	1073741971
31	2147484949
32	4294967297
33	8589934651
34	17179869827

[3, 5, 13, 17, 41, 67, 197, 257, 523, 1031, 2069, 4129, 8243, 16451, 32911, 65537, 131479, 262153, 524591, 1048601, 2097229, 4194389, 8388791, 16777441, 33554501, 67108913, 134217757, 268435889, 536871259, 1073741971, 2147484949, 4294967297, 8589934651, 17179869827]

cp's OEIS Frontend

A307512 a(n) is the smallest k > 2^n such that 2^(k-1) == 1 (mod (2^n-1)*k).

Table of values

List of values