A282016 - cp's OEIS frontend

A282016 Least k > 0 such that phi(n) divides phi(n+k).

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	2
8	2
9	4
10	2
11	11
12	1
13	8
14	4
15	1
16	1
17	15
18	1
19	8
20	4
21	5
22	3
23	23
24	6
25	8
26	2
27	10
28	7
29	29
30	2
31	30
32	2
33	8
34	6
35	4
36	1
37	20
38	16
39	6
40	8
41	14
42	3
43	6
44	6
45	7
46	21
47	47
48	3
49	37
50	5
51	13
52	4
53	53
54	3
55	20
56	9
57	6
58	29
59	59
60	4
61	16
62	15
63	10
64	4
65	32
66	9
67	67
68	12
69	20
70	2
71	71
72	1
73	18
74	2
75	7
76	15
77	16
78	6
79	78
80	5
81	28
82	6
83	83
84	6
85	43
86	12
87	26
88	12

[1, 1, 1, 1, 3, 1, 2, 2, 4, 2, 11, 1, 8, 4, 1, 1, 15, 1, 8, 4, 5, 3, 23, 6, 8, 2, 10, 7, 29, 2, 30, 2, 8, 6, 4, 1, 20, 16, 6, 8, 14, 3, 6, 6, 7, 21, 47, 3, 37, 5, 13, 4, 53, 3, 20, 9, 6, 29, 59, 4, 16, 15, 10, 4, 32, 9, 67, 12, 20, 2, 71, 1, 18, 2, 7, 15, 16, 6, 78, 5, 28, 6, 83, 6, 43, 12, 26, 12]

cp's OEIS Frontend

A282016 Least k > 0 such that phi(n) divides phi(n+k).

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	2
8	2
9	4
10	2
11	11
12	1
13	8
14	4
15	1
16	1
17	15
18	1
19	8
20	4
21	5
22	3
23	23
24	6
25	8
26	2
27	10
28	7
29	29
30	2
31	30
32	2
33	8
34	6
35	4
36	1
37	20
38	16
39	6
40	8
41	14
42	3
43	6
44	6
45	7
46	21
47	47
48	3
49	37
50	5
51	13
52	4
53	53
54	3
55	20
56	9
57	6
58	29
59	59
60	4
61	16
62	15
63	10
64	4
65	32
66	9
67	67
68	12
69	20
70	2
71	71
72	1
73	18
74	2
75	7
76	15
77	16
78	6
79	78
80	5
81	28
82	6
83	83
84	6
85	43
86	12
87	26
88	12

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	2
8	2
9	4
10	2
11	11
12	1
13	8
14	4
15	1
16	1
17	15
18	1
19	8
20	4
21	5
22	3
23	23
24	6
25	8
26	2
27	10
28	7
29	29
30	2
31	30
32	2
33	8
34	6
35	4
36	1
37	20
38	16
39	6
40	8
41	14
42	3
43	6
44	6
45	7
46	21
47	47
48	3
49	37
50	5
51	13
52	4
53	53
54	3
55	20
56	9
57	6
58	29
59	59
60	4
61	16
62	15
63	10
64	4
65	32
66	9
67	67
68	12
69	20
70	2
71	71
72	1
73	18
74	2
75	7
76	15
77	16
78	6
79	78
80	5
81	28
82	6
83	83
84	6
85	43
86	12
87	26
88	12

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	2
8	2
9	4
10	2
11	11
12	1
13	8
14	4
15	1
16	1
17	15
18	1
19	8
20	4
21	5
22	3
23	23
24	6
25	8
26	2
27	10
28	7
29	29
30	2
31	30
32	2
33	8
34	6
35	4
36	1
37	20
38	16
39	6
40	8
41	14
42	3
43	6
44	6
45	7
46	21
47	47
48	3
49	37
50	5
51	13
52	4
53	53
54	3
55	20
56	9
57	6
58	29
59	59
60	4
61	16
62	15
63	10
64	4
65	32
66	9
67	67
68	12
69	20
70	2
71	71
72	1
73	18
74	2
75	7
76	15
77	16
78	6
79	78
80	5
81	28
82	6
83	83
84	6
85	43
86	12
87	26
88	12