A070776 - cp's OEIS frontend

A070776 Numbers k such that number of terms in the k-th cyclotomic polynomial is equal to the largest prime factor of k.

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	8
8	9
9	10
10	11
11	12
12	13
13	14
14	16
15	17
16	18
17	19
18	20
19	22
20	23
21	24
22	25
23	26
24	27
25	28
26	29
27	31
28	32
29	34
30	36
31	37
32	38
33	40
34	41
35	43
36	44
37	46
38	47
39	48
40	49
41	50
42	52
43	53
44	54
45	56
46	58
47	59
48	61
49	62
50	64
51	67
52	68
53	71
54	72
55	73
56	74
57	76
58	79
59	80
60	81
61	82
62	83
63	86
64	88
65	89
66	92
67	94
68	96
69	97
70	98
71	100

[2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 22, 23, 24, 25, 26, 27, 28, 29, 31, 32, 34, 36, 37, 38, 40, 41, 43, 44, 46, 47, 48, 49, 50, 52, 53, 54, 56, 58, 59, 61, 62, 64, 67, 68, 71, 72, 73, 74, 76, 79, 80, 81, 82, 83, 86, 88, 89, 92, 94, 96, 97, 98, 100]

cp's OEIS Frontend

A070776 Numbers k such that number of terms in the k-th cyclotomic polynomial is equal to the largest prime factor of k.

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	11
11	12
12	13
13	14
14	16
15	17
16	18
17	19
18	20
19	22
20	23
21	24
22	25
23	26
24	27
25	28
26	29
27	31
28	32
29	34
30	36
31	37
32	38
33	40
34	41
35	43
36	44
37	46
38	47
39	48
40	49
41	50
42	52
43	53
44	54
45	56
46	58
47	59
48	61
49	62
50	64
51	67
52	68
53	71
54	72
55	73
56	74
57	76
58	79
59	80
60	81
61	82
62	83
63	86
64	88
65	89
66	92
67	94
68	96
69	97
70	98
71	100

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	8
8	9
9	10
10	11
11	12
12	13
13	14
14	16
15	17
16	18
17	19
18	20
19	22
20	23
21	24
22	25
23	26
24	27
25	28
26	29
27	31
28	32
29	34
30	36
31	37
32	38
33	40
34	41
35	43
36	44
37	46
38	47
39	48
40	49
41	50
42	52
43	53
44	54
45	56
46	58
47	59
48	61
49	62
50	64
51	67
52	68
53	71
54	72
55	73
56	74
57	76
58	79
59	80
60	81
61	82
62	83
63	86
64	88
65	89
66	92
67	94
68	96
69	97
70	98
71	100

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	8
8	9
9	10
10	11
11	12
12	13
13	14
14	16
15	17
16	18
17	19
18	20
19	22
20	23
21	24
22	25
23	26
24	27
25	28
26	29
27	31
28	32
29	34
30	36
31	37
32	38
33	40
34	41
35	43
36	44
37	46
38	47
39	48
40	49
41	50
42	52
43	53
44	54
45	56
46	58
47	59
48	61
49	62
50	64
51	67
52	68
53	71
54	72
55	73
56	74
57	76
58	79
59	80
60	81
61	82
62	83
63	86
64	88
65	89
66	92
67	94
68	96
69	97
70	98
71	100