A210679 - cp's OEIS frontend

A210679 Number of distinct prime factors <= 7 of n.

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

[0, 1, 1, 1, 1, 2, 1, 1, 1, 2, 0, 2, 0, 2, 2, 1, 0, 2, 0, 2, 2, 1, 0, 2, 1, 1, 1, 2, 0, 3, 0, 1, 1, 1, 2, 2, 0, 1, 1, 2, 0, 3, 0, 1, 2, 1, 0, 2, 1, 2, 1, 1, 0, 2, 1, 2, 1, 1, 0, 3, 0, 1, 2, 1, 1, 2, 0, 1, 1, 3, 0, 2, 0, 1, 2, 1, 1, 2, 0, 2, 1, 1, 0, 3, 1, 1]

cp's OEIS Frontend

A210679 Number of distinct prime factors <= 7 of n.

Table of values

List of values

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

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

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