A298398 - cp's OEIS frontend

A298398 a(n) is the smallest odd b > 1 such that (b^(2n) + 1)/2 has all prime divisors p == 1 (mod 2n).

n	a(n)
1	3
2	3
3	5
4	3
5	9
6	5
7	15
8	3
9	199
10	3
11	45
12	13
13	25
14	13
15	181
16	3
17	35
18	71
19	39
20	9
21	545
22	21
23	45
24	5
25	101
26	5
27	1405
28	13
29	59
30	107
31	61
32	3
33	5369
34	13
35	7069
36	305
37	221
38	39
39	131
40	3
41	165
42	169
43	85
44	43

[3, 3, 5, 3, 9, 5, 15, 3, 199, 3, 45, 13, 25, 13, 181, 3, 35, 71, 39, 9, 545, 21, 45, 5, 101, 5, 1405, 13, 59, 107, 61, 3, 5369, 13, 7069, 305, 221, 39, 131, 3, 165, 169, 85, 43]

cp's OEIS Frontend

A298398 a(n) is the smallest odd b > 1 such that (b^(2n) + 1)/2 has all prime divisors p == 1 (mod 2n).

Table of values

List of values