A296214 - cp's OEIS frontend

A296214 Numbers k for which there is at least one x < k such that phi(x) = phi(k).

n	a(n)
1	2
2	4
3	6
4	8
5	9
6	10
7	12
8	14
9	16
10	18
11	20
12	21
13	22
14	24
15	26
16	27
17	28
18	30
19	32
20	33
21	34
22	36
23	38
24	39
25	40
26	42
27	44
28	45
29	46
30	48
31	49
32	50
33	52
34	54
35	55
36	56
37	57
38	58
39	60
40	62
41	63
42	64
43	66
44	68
45	70
46	72
47	74
48	75
49	76
50	77
51	78
52	80
53	82
54	84
55	86
56	88
57	90
58	91
59	92
60	93
61	94
62	95
63	96
64	98
65	99
66	100
67	102
68	104
69	105
70	106
71	108
72	110
73	111
74	112
75	114
76	115

[2, 4, 6, 8, 9, 10, 12, 14, 16, 18, 20, 21, 22, 24, 26, 27, 28, 30, 32, 33, 34, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 66, 68, 70, 72, 74, 75, 76, 77, 78, 80, 82, 84, 86, 88, 90, 91, 92, 93, 94, 95, 96, 98, 99, 100, 102, 104, 105, 106, 108, 110, 111, 112, 114, 115]

cp's OEIS Frontend

A296214 Numbers k for which there is at least one x < k such that phi(x) = phi(k).

Table of values

List of values

n	a(n)
1	2
2	4
3	6
4	8
5	9
6	10
7	12
8	14
9	16
10	18
11	20
12	21
13	22
14	24
15	26
16	27
17	28
18	30
19	32
20	33
21	34
22	36
23	38
24	39
25	40
26	42
27	44
28	45
29	46
30	48
31	49
32	50
33	52
34	54
35	55
36	56
37	57
38	58
39	60
40	62
41	63
42	64
43	66
44	68
45	70
46	72
47	74
48	75
49	76
50	77
51	78
52	80
53	82
54	84
55	86
56	88
57	90
58	91
59	92
60	93
61	94
62	95
63	96
64	98
65	99
66	100
67	102
68	104
69	105
70	106
71	108
72	110
73	111
74	112
75	114
76	115

n	a(n)
1	2
2	4
3	6
4	8
5	9
6	10
7	12
8	14
9	16
10	18
11	20
12	21
13	22
14	24
15	26
16	27
17	28
18	30
19	32
20	33
21	34
22	36
23	38
24	39
25	40
26	42
27	44
28	45
29	46
30	48
31	49
32	50
33	52
34	54
35	55
36	56
37	57
38	58
39	60
40	62
41	63
42	64
43	66
44	68
45	70
46	72
47	74
48	75
49	76
50	77
51	78
52	80
53	82
54	84
55	86
56	88
57	90
58	91
59	92
60	93
61	94
62	95
63	96
64	98
65	99
66	100
67	102
68	104
69	105
70	106
71	108
72	110
73	111
74	112
75	114
76	115

n	a(n)
1	2
2	4
3	6
4	8
5	9
6	10
7	12
8	14
9	16
10	18
11	20
12	21
13	22
14	24
15	26
16	27
17	28
18	30
19	32
20	33
21	34
22	36
23	38
24	39
25	40
26	42
27	44
28	45
29	46
30	48
31	49
32	50
33	52
34	54
35	55
36	56
37	57
38	58
39	60
40	62
41	63
42	64
43	66
44	68
45	70
46	72
47	74
48	75
49	76
50	77
51	78
52	80
53	82
54	84
55	86
56	88
57	90
58	91
59	92
60	93
61	94
62	95
63	96
64	98
65	99
66	100
67	102
68	104
69	105
70	106
71	108
72	110
73	111
74	112
75	114
76	115