A072226 - cp's OEIS frontend

A072226 Numbers k such that the k-th cyclotomic polynomial evaluated at 2 (=A019320(k)) is prime.

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	8
8	9
9	10
10	12
11	13
12	14
13	15
14	16
15	17
16	19
17	22
18	24
19	26
20	27
21	30
22	31
23	32
24	33
25	34
26	38
27	40
28	42
29	46
30	49
31	56
32	61
33	62
34	65
35	69
36	77
37	78
38	80
39	85
40	86
41	89
42	90
43	93
44	98
45	107
46	120
47	122
48	126
49	127
50	129
51	133
52	145
53	150
54	158
55	165
56	170
57	174
58	184
59	192
60	195
61	202
62	208
63	234
64	254
65	261

[2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 19, 22, 24, 26, 27, 30, 31, 32, 33, 34, 38, 40, 42, 46, 49, 56, 61, 62, 65, 69, 77, 78, 80, 85, 86, 89, 90, 93, 98, 107, 120, 122, 126, 127, 129, 133, 145, 150, 158, 165, 170, 174, 184, 192, 195, 202, 208, 234, 254, 261]

cp's OEIS Frontend

A072226 Numbers k such that the k-th cyclotomic polynomial evaluated at 2 (=A019320(k)) is prime.

Table of values

List of values

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	8
8	9
9	10
10	12
11	13
12	14
13	15
14	16
15	17
16	19
17	22
18	24
19	26
20	27
21	30
22	31
23	32
24	33
25	34
26	38
27	40
28	42
29	46
30	49
31	56
32	61
33	62
34	65
35	69
36	77
37	78
38	80
39	85
40	86
41	89
42	90
43	93
44	98
45	107
46	120
47	122
48	126
49	127
50	129
51	133
52	145
53	150
54	158
55	165
56	170
57	174
58	184
59	192
60	195
61	202
62	208
63	234
64	254
65	261

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	8
8	9
9	10
10	12
11	13
12	14
13	15
14	16
15	17
16	19
17	22
18	24
19	26
20	27
21	30
22	31
23	32
24	33
25	34
26	38
27	40
28	42
29	46
30	49
31	56
32	61
33	62
34	65
35	69
36	77
37	78
38	80
39	85
40	86
41	89
42	90
43	93
44	98
45	107
46	120
47	122
48	126
49	127
50	129
51	133
52	145
53	150
54	158
55	165
56	170
57	174
58	184
59	192
60	195
61	202
62	208
63	234
64	254
65	261

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	8
8	9
9	10
10	12
11	13
12	14
13	15
14	16
15	17
16	19
17	22
18	24
19	26
20	27
21	30
22	31
23	32
24	33
25	34
26	38
27	40
28	42
29	46
30	49
31	56
32	61
33	62
34	65
35	69
36	77
37	78
38	80
39	85
40	86
41	89
42	90
43	93
44	98
45	107
46	120
47	122
48	126
49	127
50	129
51	133
52	145
53	150
54	158
55	165
56	170
57	174
58	184
59	192
60	195
61	202
62	208
63	234
64	254
65	261