A068081 - cp's OEIS frontend

A068081 Numbers n such that n + phi(n) and n - phi(n) are prime.

n	a(n)
1	15
2	33
3	35
4	51
5	65
6	77
7	91
8	95
9	143
10	161
11	177
12	209
13	213
14	215
15	217
16	247
17	255
18	303
19	335
20	341
21	371
22	411
23	427
24	435
25	447
26	455
27	533
28	545
29	561
30	573
31	591
32	611
33	665
34	707
35	713
36	717
37	779
38	803
39	871
40	917
41	933
42	965
43	1001
44	1041
45	1067
46	1105
47	1115
48	1133
49	1157
50	1159
51	1211

[15, 33, 35, 51, 65, 77, 91, 95, 143, 161, 177, 209, 213, 215, 217, 247, 255, 303, 335, 341, 371, 411, 427, 435, 447, 455, 533, 545, 561, 573, 591, 611, 665, 707, 713, 717, 779, 803, 871, 917, 933, 965, 1001, 1041, 1067, 1105, 1115, 1133, 1157, 1159, 1211]

cp's OEIS Frontend

A068081 Numbers n such that n + phi(n) and n - phi(n) are prime.

Table of values

List of values