A081373 - cp's OEIS frontend

A081373 Number of values of k, 1 <= k <= n, with phi(k) = phi(n), where phi is Euler totient function, A000010.

n	a(n)
1	1
2	2
3	1
4	2
5	1
6	3
7	1
8	2
9	2
10	3
11	1
12	4
13	1
14	3
15	1
16	2
17	1
18	4
19	1
20	3
21	2
22	2
23	1
24	4
25	1
26	3
27	2
28	4
29	1
30	5
31	1
32	2
33	2
34	3
35	1
36	5
37	1
38	3
39	2
40	4
41	1
42	6
43	1
44	3
45	3
46	2
47	1
48	5
49	2
50	4
51	1
52	4
53	1
54	4
55	2
56	5
57	2
58	2
59	1
60	6
61	1
62	2
63	3
64	2
65	1
66	5
67	1
68	3
69	1
70	6
71	1
72	7
73	1
74	4
75	3
76	5
77	2
78	8
79	1
80	4
81	1
82	4
83	1
84	9
85	1
86	3
87	1
88	5
89	1
90	10
91	2
92	2
93	3
94	2
95	3
96	5
97	1
98	4
99	4
100	6

[1, 2, 1, 2, 1, 3, 1, 2, 2, 3, 1, 4, 1, 3, 1, 2, 1, 4, 1, 3, 2, 2, 1, 4, 1, 3, 2, 4, 1, 5, 1, 2, 2, 3, 1, 5, 1, 3, 2, 4, 1, 6, 1, 3, 3, 2, 1, 5, 2, 4, 1, 4, 1, 4, 2, 5, 2, 2, 1, 6, 1, 2, 3, 2, 1, 5, 1, 3, 1, 6, 1, 7, 1, 4, 3, 5, 2, 8, 1, 4, 1, 4, 1, 9, 1, 3, 1, 5, 1, 10, 2, 2, 3, 2, 3, 5, 1, 4, 4, 6]

cp's OEIS Frontend

A081373 Number of values of k, 1 <= k <= n, with phi(k) = phi(n), where phi is Euler totient function, A000010.

Table of values

List of values

n	a(n)
1	1
2	2
3	1
4	2
5	1
6	3
7	1
8	2
9	2
10	3
11	1
12	4
13	1
14	3
15	1
16	2
17	1
18	4
19	1
20	3
21	2
22	2
23	1
24	4
25	1
26	3
27	2
28	4
29	1
30	5
31	1
32	2
33	2
34	3
35	1
36	5
37	1
38	3
39	2
40	4
41	1
42	6
43	1
44	3
45	3
46	2
47	1
48	5
49	2
50	4
51	1
52	4
53	1
54	4
55	2
56	5
57	2
58	2
59	1
60	6
61	1
62	2
63	3
64	2
65	1
66	5
67	1
68	3
69	1
70	6
71	1
72	7
73	1
74	4
75	3
76	5
77	2
78	8
79	1
80	4
81	1
82	4
83	1
84	9
85	1
86	3
87	1
88	5
89	1
90	10
91	2
92	2
93	3
94	2
95	3
96	5
97	1
98	4
99	4
100	6

n	a(n)
1	1
2	2
3	1
4	2
5	1
6	3
7	1
8	2
9	2
10	3
11	1
12	4
13	1
14	3
15	1
16	2
17	1
18	4
19	1
20	3
21	2
22	2
23	1
24	4
25	1
26	3
27	2
28	4
29	1
30	5
31	1
32	2
33	2
34	3
35	1
36	5
37	1
38	3
39	2
40	4
41	1
42	6
43	1
44	3
45	3
46	2
47	1
48	5
49	2
50	4
51	1
52	4
53	1
54	4
55	2
56	5
57	2
58	2
59	1
60	6
61	1
62	2
63	3
64	2
65	1
66	5
67	1
68	3
69	1
70	6
71	1
72	7
73	1
74	4
75	3
76	5
77	2
78	8
79	1
80	4
81	1
82	4
83	1
84	9
85	1
86	3
87	1
88	5
89	1
90	10
91	2
92	2
93	3
94	2
95	3
96	5
97	1
98	4
99	4
100	6

n	a(n)
1	1
2	2
3	1
4	2
5	1
6	3
7	1
8	2
9	2
10	3
11	1
12	4
13	1
14	3
15	1
16	2
17	1
18	4
19	1
20	3
21	2
22	2
23	1
24	4
25	1
26	3
27	2
28	4
29	1
30	5
31	1
32	2
33	2
34	3
35	1
36	5
37	1
38	3
39	2
40	4
41	1
42	6
43	1
44	3
45	3
46	2
47	1
48	5
49	2
50	4
51	1
52	4
53	1
54	4
55	2
56	5
57	2
58	2
59	1
60	6
61	1
62	2
63	3
64	2
65	1
66	5
67	1
68	3
69	1
70	6
71	1
72	7
73	1
74	4
75	3
76	5
77	2
78	8
79	1
80	4
81	1
82	4
83	1
84	9
85	1
86	3
87	1
88	5
89	1
90	10
91	2
92	2
93	3
94	2
95	3
96	5
97	1
98	4
99	4
100	6