A330746 - cp's OEIS frontend

A330746 Number of values of k, 1 <= k <= n, with A017666(k) = A017666(n), where A017666(n) = n/gcd(n, sigma(n)).

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

[1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 2, 1, 2, 3, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 3, 1, 4, 1, 1, 3, 2, 1, 1, 1, 2, 1, 2, 1, 3, 1, 4, 1, 2, 1, 1, 1, 1, 3, 1, 1, 2, 1, 4, 1, 2, 1, 5, 1, 2, 1, 1, 1, 5, 1, 1, 3, 2, 1, 1, 1, 2, 1, 3, 1, 3, 1, 1, 1, 2, 1, 3, 1, 2, 3, 1, 1, 6, 4, 4, 1, 2, 4, 2, 1, 1, 1, 1, 1, 4, 1, 1, 3]

cp's OEIS Frontend

A330746 Number of values of k, 1 <= k <= n, with A017666(k) = A017666(n), where A017666(n) = n/gcd(n, sigma(n)).

Table of values

List of values

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

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

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