A262599 - cp's OEIS frontend

A262599 Lexicographically earliest sequence of distinct terms such that, for any n > 0, phi(a(n)) = phi(n) (where phi denotes the Euler totient function), and a(n) > n if possible.

n	a(n)
1	2
2	1
3	4
4	6
5	8
6	3
7	9
8	10
9	14
10	12
11	22
12	5
13	21
14	18
15	16
16	20
17	32
18	7
19	27
20	24
21	26
22	11
23	46
24	30
25	33
26	28
27	38
28	36
29	58
30	15
31	62
32	34
33	44
34	40
35	39
36	42
37	57
38	54
39	45
40	48
41	55
42	13
43	49
44	50
45	52
46	23
47	94
48	60
49	86
50	66
51	64
52	56
53	106
54	19
55	75
56	70
57	63
58	29
59	118
60	17
61	77
62	31
63	74
64	68
65	104
66	25

[2, 1, 4, 6, 8, 3, 9, 10, 14, 12, 22, 5, 21, 18, 16, 20, 32, 7, 27, 24, 26, 11, 46, 30, 33, 28, 38, 36, 58, 15, 62, 34, 44, 40, 39, 42, 57, 54, 45, 48, 55, 13, 49, 50, 52, 23, 94, 60, 86, 66, 64, 56, 106, 19, 75, 70, 63, 29, 118, 17, 77, 31, 74, 68, 104, 25]

cp's OEIS Frontend

A262599 Lexicographically earliest sequence of distinct terms such that, for any n > 0, phi(a(n)) = phi(n) (where phi denotes the Euler totient function), and a(n) > n if possible.

Table of values

List of values

n	a(n)
1	2
2	1
3	4
4	6
5	8
6	3
7	9
8	10
9	14
10	12
11	22
12	5
13	21
14	18
15	16
16	20
17	32
18	7
19	27
20	24
21	26
22	11
23	46
24	30
25	33
26	28
27	38
28	36
29	58
30	15
31	62
32	34
33	44
34	40
35	39
36	42
37	57
38	54
39	45
40	48
41	55
42	13
43	49
44	50
45	52
46	23
47	94
48	60
49	86
50	66
51	64
52	56
53	106
54	19
55	75
56	70
57	63
58	29
59	118
60	17
61	77
62	31
63	74
64	68
65	104
66	25

n	a(n)
1	2
2	1
3	4
4	6
5	8
6	3
7	9
8	10
9	14
10	12
11	22
12	5
13	21
14	18
15	16
16	20
17	32
18	7
19	27
20	24
21	26
22	11
23	46
24	30
25	33
26	28
27	38
28	36
29	58
30	15
31	62
32	34
33	44
34	40
35	39
36	42
37	57
38	54
39	45
40	48
41	55
42	13
43	49
44	50
45	52
46	23
47	94
48	60
49	86
50	66
51	64
52	56
53	106
54	19
55	75
56	70
57	63
58	29
59	118
60	17
61	77
62	31
63	74
64	68
65	104
66	25

n	a(n)
1	2
2	1
3	4
4	6
5	8
6	3
7	9
8	10
9	14
10	12
11	22
12	5
13	21
14	18
15	16
16	20
17	32
18	7
19	27
20	24
21	26
22	11
23	46
24	30
25	33
26	28
27	38
28	36
29	58
30	15
31	62
32	34
33	44
34	40
35	39
36	42
37	57
38	54
39	45
40	48
41	55
42	13
43	49
44	50
45	52
46	23
47	94
48	60
49	86
50	66
51	64
52	56
53	106
54	19
55	75
56	70
57	63
58	29
59	118
60	17
61	77
62	31
63	74
64	68
65	104
66	25