A318875 - cp's OEIS frontend

A318875 Number of divisors d of n for which 2*phi(d) < d.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	0
9	0
10	1
11	0
12	2
13	0
14	1
15	0
16	0
17	0
18	2
19	0
20	2
21	0
22	1
23	0
24	3
25	0
26	1
27	0
28	2
29	0
30	3
31	0
32	0
33	0
34	1
35	0
36	4
37	0
38	1
39	0
40	3
41	0
42	3
43	0
44	2
45	0
46	1
47	0
48	4
49	0
50	2
51	0
52	2
53	0
54	3
55	0
56	3
57	0
58	1
59	0
60	6
61	0
62	1
63	0
64	0
65	0
66	3
67	0
68	2
69	0
70	3
71	0
72	6
73	0
74	1
75	0
76	2
77	0
78	3
79	0
80	4
81	0
82	1
83	0
84	6
85	0
86	1
87	0
88	3
89	0
90	5
91	0
92	2
93	0
94	1
95	0
96	5
97	0
98	2
99	0
100	4
101	0
102	3
103	0
104	3
105	1

[0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 2, 0, 1, 0, 0, 0, 2, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 3, 0, 0, 0, 1, 0, 4, 0, 1, 0, 3, 0, 3, 0, 2, 0, 1, 0, 4, 0, 2, 0, 2, 0, 3, 0, 3, 0, 1, 0, 6, 0, 1, 0, 0, 0, 3, 0, 2, 0, 3, 0, 6, 0, 1, 0, 2, 0, 3, 0, 4, 0, 1, 0, 6, 0, 1, 0, 3, 0, 5, 0, 2, 0, 1, 0, 5, 0, 2, 0, 4, 0, 3, 0, 3, 1]

cp's OEIS Frontend

A318875 Number of divisors d of n for which 2*phi(d) < d.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	0
9	0
10	1
11	0
12	2
13	0
14	1
15	0
16	0
17	0
18	2
19	0
20	2
21	0
22	1
23	0
24	3
25	0
26	1
27	0
28	2
29	0
30	3
31	0
32	0
33	0
34	1
35	0
36	4
37	0
38	1
39	0
40	3
41	0
42	3
43	0
44	2
45	0
46	1
47	0
48	4
49	0
50	2
51	0
52	2
53	0
54	3
55	0
56	3
57	0
58	1
59	0
60	6
61	0
62	1
63	0
64	0
65	0
66	3
67	0
68	2
69	0
70	3
71	0
72	6
73	0
74	1
75	0
76	2
77	0
78	3
79	0
80	4
81	0
82	1
83	0
84	6
85	0
86	1
87	0
88	3
89	0
90	5
91	0
92	2
93	0
94	1
95	0
96	5
97	0
98	2
99	0
100	4
101	0
102	3
103	0
104	3
105	1

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	0
9	0
10	1
11	0
12	2
13	0
14	1
15	0
16	0
17	0
18	2
19	0
20	2
21	0
22	1
23	0
24	3
25	0
26	1
27	0
28	2
29	0
30	3
31	0
32	0
33	0
34	1
35	0
36	4
37	0
38	1
39	0
40	3
41	0
42	3
43	0
44	2
45	0
46	1
47	0
48	4
49	0
50	2
51	0
52	2
53	0
54	3
55	0
56	3
57	0
58	1
59	0
60	6
61	0
62	1
63	0
64	0
65	0
66	3
67	0
68	2
69	0
70	3
71	0
72	6
73	0
74	1
75	0
76	2
77	0
78	3
79	0
80	4
81	0
82	1
83	0
84	6
85	0
86	1
87	0
88	3
89	0
90	5
91	0
92	2
93	0
94	1
95	0
96	5
97	0
98	2
99	0
100	4
101	0
102	3
103	0
104	3
105	1

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	0
9	0
10	1
11	0
12	2
13	0
14	1
15	0
16	0
17	0
18	2
19	0
20	2
21	0
22	1
23	0
24	3
25	0
26	1
27	0
28	2
29	0
30	3
31	0
32	0
33	0
34	1
35	0
36	4
37	0
38	1
39	0
40	3
41	0
42	3
43	0
44	2
45	0
46	1
47	0
48	4
49	0
50	2
51	0
52	2
53	0
54	3
55	0
56	3
57	0
58	1
59	0
60	6
61	0
62	1
63	0
64	0
65	0
66	3
67	0
68	2
69	0
70	3
71	0
72	6
73	0
74	1
75	0
76	2
77	0
78	3
79	0
80	4
81	0
82	1
83	0
84	6
85	0
86	1
87	0
88	3
89	0
90	5
91	0
92	2
93	0
94	1
95	0
96	5
97	0
98	2
99	0
100	4
101	0
102	3
103	0
104	3
105	1