A173801 - cp's OEIS frontend

A173801 The number of primitive numbers k such that 1/k is in the Cantor set and the fraction 1/k has period n.

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	3
7	1
8	4
9	2
10	3
11	1
12	9
13	1
14	3
15	3
16	9
17	1
18	14
19	1
20	12
21	3
22	3
23	1
24	28
25	2
26	3
27	5
28	9
29	1
30	32
31	1
32	17
33	3
34	3
35	3
36	50
37	1
38	3
39	5
40	31
41	1
42	32
43	1
44	9
45	14
46	4
47	1
48	97
49	2
50	10
51	3
52	9
53	1
54	57
55	4
56	27
57	3
58	4
59	1
60	160
61	1
62	3
63	9
64	34
65	3
66	32
67	1
68	9
69	3
70	23
71	1
72	193
73	1
74	3
75	10
76	9
77	3
78	51
79	1
80	102
81	9
82	3
83	1
84	148
85	3
86	3
87	3
88	28
89	1
90	255
91	3

[1, 1, 1, 2, 1, 3, 1, 4, 2, 3, 1, 9, 1, 3, 3, 9, 1, 14, 1, 12, 3, 3, 1, 28, 2, 3, 5, 9, 1, 32, 1, 17, 3, 3, 3, 50, 1, 3, 5, 31, 1, 32, 1, 9, 14, 4, 1, 97, 2, 10, 3, 9, 1, 57, 4, 27, 3, 4, 1, 160, 1, 3, 9, 34, 3, 32, 1, 9, 3, 23, 1, 193, 1, 3, 10, 9, 3, 51, 1, 102, 9, 3, 1, 148, 3, 3, 3, 28, 1, 255, 3]

cp's OEIS Frontend

A173801 The number of primitive numbers k such that 1/k is in the Cantor set and the fraction 1/k has period n.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	3
7	1
8	4
9	2
10	3
11	1
12	9
13	1
14	3
15	3
16	9
17	1
18	14
19	1
20	12
21	3
22	3
23	1
24	28
25	2
26	3
27	5
28	9
29	1
30	32
31	1
32	17
33	3
34	3
35	3
36	50
37	1
38	3
39	5
40	31
41	1
42	32
43	1
44	9
45	14
46	4
47	1
48	97
49	2
50	10
51	3
52	9
53	1
54	57
55	4
56	27
57	3
58	4
59	1
60	160
61	1
62	3
63	9
64	34
65	3
66	32
67	1
68	9
69	3
70	23
71	1
72	193
73	1
74	3
75	10
76	9
77	3
78	51
79	1
80	102
81	9
82	3
83	1
84	148
85	3
86	3
87	3
88	28
89	1
90	255
91	3

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	3
7	1
8	4
9	2
10	3
11	1
12	9
13	1
14	3
15	3
16	9
17	1
18	14
19	1
20	12
21	3
22	3
23	1
24	28
25	2
26	3
27	5
28	9
29	1
30	32
31	1
32	17
33	3
34	3
35	3
36	50
37	1
38	3
39	5
40	31
41	1
42	32
43	1
44	9
45	14
46	4
47	1
48	97
49	2
50	10
51	3
52	9
53	1
54	57
55	4
56	27
57	3
58	4
59	1
60	160
61	1
62	3
63	9
64	34
65	3
66	32
67	1
68	9
69	3
70	23
71	1
72	193
73	1
74	3
75	10
76	9
77	3
78	51
79	1
80	102
81	9
82	3
83	1
84	148
85	3
86	3
87	3
88	28
89	1
90	255
91	3

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	3
7	1
8	4
9	2
10	3
11	1
12	9
13	1
14	3
15	3
16	9
17	1
18	14
19	1
20	12
21	3
22	3
23	1
24	28
25	2
26	3
27	5
28	9
29	1
30	32
31	1
32	17
33	3
34	3
35	3
36	50
37	1
38	3
39	5
40	31
41	1
42	32
43	1
44	9
45	14
46	4
47	1
48	97
49	2
50	10
51	3
52	9
53	1
54	57
55	4
56	27
57	3
58	4
59	1
60	160
61	1
62	3
63	9
64	34
65	3
66	32
67	1
68	9
69	3
70	23
71	1
72	193
73	1
74	3
75	10
76	9
77	3
78	51
79	1
80	102
81	9
82	3
83	1
84	148
85	3
86	3
87	3
88	28
89	1
90	255
91	3