A370879 - cp's OEIS frontend

A370879 a(n) = 2^nt + 1 where t is the least x such that there exists an r in the range 2 <= r <= x+1 that is coprime to 2^nx + 1 and has multiplicative order 2^n modulo 2^n*x + 1.

n	a(n)
1	3
2	5
3	17
4	193
5	353
6	641
7	769
8	10753
9	10753
10	13313
11	12289
12	114689
13	114689
14	163841
15	786433
16	786433
17	6684673
18	13631489
19	5767169
20	7340033
21	111149057
22	104857601
23	167772161
24	167772161
25	469762049
26	2483027969
27	2281701377
28	3221225473
29	12348030977
30	52613349377

[3, 5, 17, 193, 353, 641, 769, 10753, 10753, 13313, 12289, 114689, 114689, 163841, 786433, 786433, 6684673, 13631489, 5767169, 7340033, 111149057, 104857601, 167772161, 167772161, 469762049, 2483027969, 2281701377, 3221225473, 12348030977, 52613349377]

cp's OEIS Frontend

A370879 a(n) = 2^nt + 1 where t is the least x such that there exists an r in the range 2 <= r <= x+1 that is coprime to 2^nx + 1 and has multiplicative order 2^n modulo 2^n*x + 1.

Table of values

List of values

cp's OEIS Frontend

A370879 a(n) = 2^n*t + 1 where t is the least x such that there exists an r in the range 2 <= r <= x+1 that is coprime to 2^n*x + 1 and has multiplicative order 2^n modulo 2^n*x + 1.

Table of values

List of values

A370879 a(n) = 2^nt + 1 where t is the least x such that there exists an r in the range 2 <= r <= x+1 that is coprime to 2^nx + 1 and has multiplicative order 2^n modulo 2^n*x + 1.