A100395 - cp's OEIS frontend

A100395 The smallest prime number q such that the greatest prime divisor of 2*q+1 equals the n-th prime.

n	a(n)
2	13
3	2
4	3
5	5
6	19
7	59
8	47
9	11
10	43
11	139
12	277
13	61
14	107
15	23
16	79
17	29
18	457
19	167
20	461
21	109
22	197
23	41
24	311
25	727
26	151
27	257
28	53
29	163
30	2203
31	317
32	1637
33	479
34	347
35	223
36	1283
37	863
38	733
39	83
40	1297
41	89
42	271
43	859
44	1061
45	1871
46	2089
47	5591
48	557
49	113
50	1259
51	349
52	1553
53	3253
54	1129
55	2441

[13, 2, 3, 5, 19, 59, 47, 11, 43, 139, 277, 61, 107, 23, 79, 29, 457, 167, 461, 109, 197, 41, 311, 727, 151, 257, 53, 163, 2203, 317, 1637, 479, 347, 223, 1283, 863, 733, 83, 1297, 89, 271, 859, 1061, 1871, 2089, 5591, 557, 113, 1259, 349, 1553, 3253, 1129, 2441]

cp's OEIS Frontend

A100395 The smallest prime number q such that the greatest prime divisor of 2*q+1 equals the n-th prime.

Table of values

List of values