A086288 - cp's OEIS frontend

A086288 Number of distinct prime factors of 7-smooth numbers.

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

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

cp's OEIS Frontend

A086288 Number of distinct prime factors of 7-smooth numbers.

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

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

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