A304649 - cp's OEIS frontend

A304649 Number of divisors d|n such that neither d nor n/d is a perfect power greater than 1.

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

[1, 2, 2, 1, 2, 4, 2, 0, 1, 4, 2, 4, 2, 4, 4, 0, 2, 4, 2, 4, 4, 4, 2, 4, 1, 4, 0, 4, 2, 8, 2, 0, 4, 4, 4, 5, 2, 4, 4, 4, 2, 8, 2, 4, 4, 4, 2, 4, 1, 4, 4, 4, 2, 4, 4, 4, 4, 4, 2, 10, 2, 4, 4, 0, 4, 8, 2, 4, 4, 8, 2, 6, 2, 4, 4, 4, 4, 8, 2, 4, 0, 4, 2, 10, 4, 4, 4, 4]

cp's OEIS Frontend

A304649 Number of divisors d|n such that neither d nor n/d is a perfect power greater than 1.

Table of values

List of values

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

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

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