A268640 - cp's OEIS frontend

A268640 Primes of the form 2^i * 3^j - 1 for positive i, j.

n	a(n)
1	5
2	11
3	17
4	23
5	47
6	53
7	71
8	107
9	191
10	383
11	431
12	647
13	863
14	971
15	1151
16	2591
17	4373
18	6143
19	6911
20	8747
21	13121
22	15551
23	23327
24	27647
25	62207
26	73727
27	139967
28	165887
29	294911
30	314927
31	442367
32	472391
33	497663
34	786431
35	995327
36	1062881
37	2519423
38	10616831
39	17915903
40	18874367

[5, 11, 17, 23, 47, 53, 71, 107, 191, 383, 431, 647, 863, 971, 1151, 2591, 4373, 6143, 6911, 8747, 13121, 15551, 23327, 27647, 62207, 73727, 139967, 165887, 294911, 314927, 442367, 472391, 497663, 786431, 995327, 1062881, 2519423, 10616831, 17915903, 18874367]

cp's OEIS Frontend

A268640 Primes of the form 2^i * 3^j - 1 for positive i, j.

Table of values

List of values