A076487 - cp's OEIS frontend

A076487 Solutions to gcd(sigma(x), phi(x)) = gcd(sigma(core(x)), phi(core(x))), i.e., when A009223(x) = A066086(x) or if A066087(x) = 0.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	10
10	11
11	13
12	14
13	15
14	16
15	17
16	19
17	20
18	21
19	22
20	23
21	26
22	27
23	29
24	30
25	31
26	32
27	33
28	34
29	35
30	37
31	38
32	39
33	40
34	41
35	42
36	43
37	46
38	47
39	51
40	53
41	55
42	57
43	58
44	59
45	60
46	61
47	62
48	63
49	64
50	65
51	66
52	67
53	68
54	69
55	70
56	71
57	73
58	74
59	77
60	78
61	79
62	80
63	82
64	83
65	85
66	86
67	87
68	89
69	91
70	93
71	94
72	95

[1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 26, 27, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 42, 43, 46, 47, 51, 53, 55, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 73, 74, 77, 78, 79, 80, 82, 83, 85, 86, 87, 89, 91, 93, 94, 95]

cp's OEIS Frontend

A076487 Solutions to gcd(sigma(x), phi(x)) = gcd(sigma(core(x)), phi(core(x))), i.e., when A009223(x) = A066086(x) or if A066087(x) = 0.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	10
10	11
11	13
12	14
13	15
14	16
15	17
16	19
17	20
18	21
19	22
20	23
21	26
22	27
23	29
24	30
25	31
26	32
27	33
28	34
29	35
30	37
31	38
32	39
33	40
34	41
35	42
36	43
37	46
38	47
39	51
40	53
41	55
42	57
43	58
44	59
45	60
46	61
47	62
48	63
49	64
50	65
51	66
52	67
53	68
54	69
55	70
56	71
57	73
58	74
59	77
60	78
61	79
62	80
63	82
64	83
65	85
66	86
67	87
68	89
69	91
70	93
71	94
72	95

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	10
10	11
11	13
12	14
13	15
14	16
15	17
16	19
17	20
18	21
19	22
20	23
21	26
22	27
23	29
24	30
25	31
26	32
27	33
28	34
29	35
30	37
31	38
32	39
33	40
34	41
35	42
36	43
37	46
38	47
39	51
40	53
41	55
42	57
43	58
44	59
45	60
46	61
47	62
48	63
49	64
50	65
51	66
52	67
53	68
54	69
55	70
56	71
57	73
58	74
59	77
60	78
61	79
62	80
63	82
64	83
65	85
66	86
67	87
68	89
69	91
70	93
71	94
72	95

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	10
10	11
11	13
12	14
13	15
14	16
15	17
16	19
17	20
18	21
19	22
20	23
21	26
22	27
23	29
24	30
25	31
26	32
27	33
28	34
29	35
30	37
31	38
32	39
33	40
34	41
35	42
36	43
37	46
38	47
39	51
40	53
41	55
42	57
43	58
44	59
45	60
46	61
47	62
48	63
49	64
50	65
51	66
52	67
53	68
54	69
55	70
56	71
57	73
58	74
59	77
60	78
61	79
62	80
63	82
64	83
65	85
66	86
67	87
68	89
69	91
70	93
71	94
72	95