A331178 - cp's OEIS frontend

A331178 Number of values of k, 1 <= k <= n, with A023900(k) = A023900(n), where A023900 is Dirichlet inverse of Euler totient function phi.

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	1
7	1
8	3
9	2
10	1
11	1
12	2
13	1
14	1
15	1
16	4
17	1
18	3
19	1
20	2
21	1
22	1
23	1
24	4
25	2
26	2
27	3
28	2
29	1
30	1
31	1
32	5
33	1
34	1
35	1
36	5
37	1
38	1
39	2
40	3
41	1
42	2
43	1
44	2
45	2
46	1
47	1
48	6
49	2
50	4
51	1
52	3
53	1
54	7
55	1
56	3
57	1
58	1
59	1
60	2
61	1
62	1
63	4
64	6
65	1
66	1
67	1
68	2
69	1
70	1
71	1
72	8
73	1
74	2
75	3
76	2
77	1
78	2
79	1
80	5
81	4
82	2
83	1
84	3
85	1
86	1
87	1
88	3
89	1
90	3
91	1
92	2
93	2
94	1
95	2
96	9
97	1
98	4
99	2
100	6
101	1
102	1
103	1
104	5
105	1

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

cp's OEIS Frontend

A331178 Number of values of k, 1 <= k <= n, with A023900(k) = A023900(n), where A023900 is Dirichlet inverse of Euler totient function phi.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	1
7	1
8	3
9	2
10	1
11	1
12	2
13	1
14	1
15	1
16	4
17	1
18	3
19	1
20	2
21	1
22	1
23	1
24	4
25	2
26	2
27	3
28	2
29	1
30	1
31	1
32	5
33	1
34	1
35	1
36	5
37	1
38	1
39	2
40	3
41	1
42	2
43	1
44	2
45	2
46	1
47	1
48	6
49	2
50	4
51	1
52	3
53	1
54	7
55	1
56	3
57	1
58	1
59	1
60	2
61	1
62	1
63	4
64	6
65	1
66	1
67	1
68	2
69	1
70	1
71	1
72	8
73	1
74	2
75	3
76	2
77	1
78	2
79	1
80	5
81	4
82	2
83	1
84	3
85	1
86	1
87	1
88	3
89	1
90	3
91	1
92	2
93	2
94	1
95	2
96	9
97	1
98	4
99	2
100	6
101	1
102	1
103	1
104	5
105	1

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	1
7	1
8	3
9	2
10	1
11	1
12	2
13	1
14	1
15	1
16	4
17	1
18	3
19	1
20	2
21	1
22	1
23	1
24	4
25	2
26	2
27	3
28	2
29	1
30	1
31	1
32	5
33	1
34	1
35	1
36	5
37	1
38	1
39	2
40	3
41	1
42	2
43	1
44	2
45	2
46	1
47	1
48	6
49	2
50	4
51	1
52	3
53	1
54	7
55	1
56	3
57	1
58	1
59	1
60	2
61	1
62	1
63	4
64	6
65	1
66	1
67	1
68	2
69	1
70	1
71	1
72	8
73	1
74	2
75	3
76	2
77	1
78	2
79	1
80	5
81	4
82	2
83	1
84	3
85	1
86	1
87	1
88	3
89	1
90	3
91	1
92	2
93	2
94	1
95	2
96	9
97	1
98	4
99	2
100	6
101	1
102	1
103	1
104	5
105	1

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	1
7	1
8	3
9	2
10	1
11	1
12	2
13	1
14	1
15	1
16	4
17	1
18	3
19	1
20	2
21	1
22	1
23	1
24	4
25	2
26	2
27	3
28	2
29	1
30	1
31	1
32	5
33	1
34	1
35	1
36	5
37	1
38	1
39	2
40	3
41	1
42	2
43	1
44	2
45	2
46	1
47	1
48	6
49	2
50	4
51	1
52	3
53	1
54	7
55	1
56	3
57	1
58	1
59	1
60	2
61	1
62	1
63	4
64	6
65	1
66	1
67	1
68	2
69	1
70	1
71	1
72	8
73	1
74	2
75	3
76	2
77	1
78	2
79	1
80	5
81	4
82	2
83	1
84	3
85	1
86	1
87	1
88	3
89	1
90	3
91	1
92	2
93	2
94	1
95	2
96	9
97	1
98	4
99	2
100	6
101	1
102	1
103	1
104	5
105	1