A014567 - cp's OEIS frontend

A014567 Numbers k such that k and sigma(k) are relatively prime, where sigma(k) = sum of divisors of k (A000203).

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	11
10	13
11	16
12	17
13	19
14	21
15	23
16	25
17	27
18	29
19	31
20	32
21	35
22	36
23	37
24	39
25	41
26	43
27	47
28	49
29	50
30	53
31	55
32	57
33	59
34	61
35	63
36	64
37	65
38	67
39	71
40	73
41	75
42	77
43	79
44	81
45	83
46	85
47	89
48	93
49	97
50	98
51	100
52	101
53	103
54	107
55	109
56	111
57	113
58	115
59	119
60	121
61	125
62	127
63	128
64	129
65	131
66	133

[1, 2, 3, 4, 5, 7, 8, 9, 11, 13, 16, 17, 19, 21, 23, 25, 27, 29, 31, 32, 35, 36, 37, 39, 41, 43, 47, 49, 50, 53, 55, 57, 59, 61, 63, 64, 65, 67, 71, 73, 75, 77, 79, 81, 83, 85, 89, 93, 97, 98, 100, 101, 103, 107, 109, 111, 113, 115, 119, 121, 125, 127, 128, 129, 131, 133]

cp's OEIS Frontend

A014567 Numbers k such that k and sigma(k) are relatively prime, where sigma(k) = sum of divisors of k (A000203).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	11
10	13
11	16
12	17
13	19
14	21
15	23
16	25
17	27
18	29
19	31
20	32
21	35
22	36
23	37
24	39
25	41
26	43
27	47
28	49
29	50
30	53
31	55
32	57
33	59
34	61
35	63
36	64
37	65
38	67
39	71
40	73
41	75
42	77
43	79
44	81
45	83
46	85
47	89
48	93
49	97
50	98
51	100
52	101
53	103
54	107
55	109
56	111
57	113
58	115
59	119
60	121
61	125
62	127
63	128
64	129
65	131
66	133

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	11
10	13
11	16
12	17
13	19
14	21
15	23
16	25
17	27
18	29
19	31
20	32
21	35
22	36
23	37
24	39
25	41
26	43
27	47
28	49
29	50
30	53
31	55
32	57
33	59
34	61
35	63
36	64
37	65
38	67
39	71
40	73
41	75
42	77
43	79
44	81
45	83
46	85
47	89
48	93
49	97
50	98
51	100
52	101
53	103
54	107
55	109
56	111
57	113
58	115
59	119
60	121
61	125
62	127
63	128
64	129
65	131
66	133

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	11
10	13
11	16
12	17
13	19
14	21
15	23
16	25
17	27
18	29
19	31
20	32
21	35
22	36
23	37
24	39
25	41
26	43
27	47
28	49
29	50
30	53
31	55
32	57
33	59
34	61
35	63
36	64
37	65
38	67
39	71
40	73
41	75
42	77
43	79
44	81
45	83
46	85
47	89
48	93
49	97
50	98
51	100
52	101
53	103
54	107
55	109
56	111
57	113
58	115
59	119
60	121
61	125
62	127
63	128
64	129
65	131
66	133