A351416 - cp's OEIS frontend

A351416 Number of divisors of n that are either squarefree semiprimes, numbers of the form p^k (p prime, k>1), or numbers with at least one square divisor > 1 and 3 or more distinct prime factors.

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

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

cp's OEIS Frontend

A351416 Number of divisors of n that are either squarefree semiprimes, numbers of the form p^k (p prime, k>1), or numbers with at least one square divisor > 1 and 3 or more distinct prime factors.

Table of values

List of values

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

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

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