A268657 - cp's OEIS frontend

A268657 Numbers k such that 3*2^k + 1 is a prime factor of a generalized Fermat number 3^(2^m) + 1 for some m.

n	a(n)
1	6
2	12
3	18
4	30
5	36
6	41
7	66
8	189
9	201
10	209
11	276
12	408
13	438
14	534
15	2208
16	3168
17	3189
18	3912
19	34350
20	42294
21	44685
22	48150
23	54792
24	55182
25	59973
26	80190
27	157169
28	213321
29	303093
30	382449
31	709968
32	801978
33	916773
34	1832496
35	2145353
36	2291610
37	2478785
38	5082306
39	7033641
40	10829346

[6, 12, 18, 30, 36, 41, 66, 189, 201, 209, 276, 408, 438, 534, 2208, 3168, 3189, 3912, 34350, 42294, 44685, 48150, 54792, 55182, 59973, 80190, 157169, 213321, 303093, 382449, 709968, 801978, 916773, 1832496, 2145353, 2291610, 2478785, 5082306, 7033641, 10829346]

cp's OEIS Frontend

A268657 Numbers k such that 3*2^k + 1 is a prime factor of a generalized Fermat number 3^(2^m) + 1 for some m.

Table of values

List of values