A225318 - cp's OEIS frontend

A225318 Numbers n such that either prime(n-1) == -1 (mod n) or prime(n+1) == -1 (mod n) but not both.

n	a(n)
1	2
2	4
3	7
4	8
5	14
6	16
7	26
8	27
9	32
10	33
11	35
12	76
13	78
14	169
15	170
16	172
17	175
18	177
19	183
20	184
21	185
22	434
23	446
24	1054
25	1056
26	2638
27	2702
28	6468
29	15930
30	40069
31	40070
32	40080
33	40112
34	40115
35	40157
36	251721
37	251758
38	251767
39	251770
40	251788
41	637286
42	4124464
43	4124704

[2, 4, 7, 8, 14, 16, 26, 27, 32, 33, 35, 76, 78, 169, 170, 172, 175, 177, 183, 184, 185, 434, 446, 1054, 1056, 2638, 2702, 6468, 15930, 40069, 40070, 40080, 40112, 40115, 40157, 251721, 251758, 251767, 251770, 251788, 637286, 4124464, 4124704]

cp's OEIS Frontend

A225318 Numbers n such that either prime(n-1) == -1 (mod n) or prime(n+1) == -1 (mod n) but not both.

Table of values

List of values