A005087 - cp's OEIS frontend

A005087 Number of distinct odd primes dividing n.

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

[0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 2, 0, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 0, 2, 1, 2, 1, 1, 1, 2, 1, 1, 2, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 2, 1, 1, 2, 1, 1, 2, 0, 2, 2, 1, 1, 2, 2, 1, 1, 1, 1, 2, 1, 2, 2, 1, 1, 1, 1, 1, 2, 2, 1, 2, 1, 1, 2, 2, 1, 2, 1, 2, 1, 1, 1, 2, 1, 1, 2]

cp's OEIS Frontend

A005087 Number of distinct odd primes dividing n.

Table of values

List of values

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

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

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