A250183 - cp's OEIS frontend

A250183 Numbers n such that Phi(30,n) is prime, where Phi is the cyclotomic polynomial.

n	a(n)
1	2
2	6
3	7
4	8
5	9
6	16
7	18
8	20
9	26
10	29
11	31
12	32
13	33
14	40
15	41
16	47
17	57
18	76
19	82
20	87
21	88
22	93
23	101
24	109
25	120
26	121
27	125
28	133
29	140
30	144
31	162
32	163
33	175
34	178
35	183
36	186
37	191
38	196
39	215
40	216
41	218
42	227
43	233
44	242
45	253
46	266
47	267
48	273
49	276
50	278
51	304
52	312
53	317
54	319
55	328
56	336
57	374
58	380

[2, 6, 7, 8, 9, 16, 18, 20, 26, 29, 31, 32, 33, 40, 41, 47, 57, 76, 82, 87, 88, 93, 101, 109, 120, 121, 125, 133, 140, 144, 162, 163, 175, 178, 183, 186, 191, 196, 215, 216, 218, 227, 233, 242, 253, 266, 267, 273, 276, 278, 304, 312, 317, 319, 328, 336, 374, 380]

cp's OEIS Frontend

A250183 Numbers n such that Phi(30,n) is prime, where Phi is the cyclotomic polynomial.

Table of values

List of values

n	a(n)
1	2
2	6
3	7
4	8
5	9
6	16
7	18
8	20
9	26
10	29
11	31
12	32
13	33
14	40
15	41
16	47
17	57
18	76
19	82
20	87
21	88
22	93
23	101
24	109
25	120
26	121
27	125
28	133
29	140
30	144
31	162
32	163
33	175
34	178
35	183
36	186
37	191
38	196
39	215
40	216
41	218
42	227
43	233
44	242
45	253
46	266
47	267
48	273
49	276
50	278
51	304
52	312
53	317
54	319
55	328
56	336
57	374
58	380

n	a(n)
1	2
2	6
3	7
4	8
5	9
6	16
7	18
8	20
9	26
10	29
11	31
12	32
13	33
14	40
15	41
16	47
17	57
18	76
19	82
20	87
21	88
22	93
23	101
24	109
25	120
26	121
27	125
28	133
29	140
30	144
31	162
32	163
33	175
34	178
35	183
36	186
37	191
38	196
39	215
40	216
41	218
42	227
43	233
44	242
45	253
46	266
47	267
48	273
49	276
50	278
51	304
52	312
53	317
54	319
55	328
56	336
57	374
58	380

n	a(n)
1	2
2	6
3	7
4	8
5	9
6	16
7	18
8	20
9	26
10	29
11	31
12	32
13	33
14	40
15	41
16	47
17	57
18	76
19	82
20	87
21	88
22	93
23	101
24	109
25	120
26	121
27	125
28	133
29	140
30	144
31	162
32	163
33	175
34	178
35	183
36	186
37	191
38	196
39	215
40	216
41	218
42	227
43	233
44	242
45	253
46	266
47	267
48	273
49	276
50	278
51	304
52	312
53	317
54	319
55	328
56	336
57	374
58	380