A109927 - cp's OEIS frontend

A109927 First primes p connected to two primes either by 2p+1 or 2p-1 upward [downward (p-1)/2 or (p+1)/2].

n	a(n)
1	3
2	5
3	11
4	23
5	37
6	83
7	157
8	179
9	359
10	661
11	719
12	877
13	997
14	1019
15	1237
16	1439
17	1657
18	2039
19	2063
20	2137
21	2459
22	2557
23	2819
24	2903
25	2963
26	3023
27	3061
28	3623
29	3779
30	3803
31	3863
32	4177
33	4261
34	4357
35	4621
36	4919
37	5399
38	5581
39	5639
40	6037
41	6121
42	6217
43	6361
44	6899
45	6983
46	7079

[3, 5, 11, 23, 37, 83, 157, 179, 359, 661, 719, 877, 997, 1019, 1237, 1439, 1657, 2039, 2063, 2137, 2459, 2557, 2819, 2903, 2963, 3023, 3061, 3623, 3779, 3803, 3863, 4177, 4261, 4357, 4621, 4919, 5399, 5581, 5639, 6037, 6121, 6217, 6361, 6899, 6983, 7079]

cp's OEIS Frontend

A109927 First primes p connected to two primes either by 2p+1 or 2p-1 upward [downward (p-1)/2 or (p+1)/2].

Table of values

List of values