A046809 - cp's OEIS frontend

A046809 a(n) is the least integer greater than a(n-1) such that a(n-1)*2^a(n) - 1 is prime, a(1) = 1.

n	a(n)
1	1
2	2
3	4
4	5
5	8
6	10
7	11
8	26
9	286
10	365
11	602
12	630
13	713
14	808
15	1327
16	3561
17	3566
18	5286
19	5477
20	10600
21	13485
22	15441
23	17339
24	76856
25	277718
26	279098
27	977278
28	3437687
29	3564664
30	3883403
31	4254462
32	4972164

[1, 2, 4, 5, 8, 10, 11, 26, 286, 365, 602, 630, 713, 808, 1327, 3561, 3566, 5286, 5477, 10600, 13485, 15441, 17339, 76856, 277718, 279098, 977278, 3437687, 3564664, 3883403, 4254462, 4972164]

cp's OEIS Frontend

A046809 a(n) is the least integer greater than a(n-1) such that a(n-1)*2^a(n) - 1 is prime, a(1) = 1.

Table of values

List of values