A334655 - cp's OEIS frontend

A334655 Number of integers less than n with the same number of distinct prime factors as n.

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

[0, 0, 1, 2, 3, 0, 4, 5, 6, 1, 7, 2, 8, 3, 4, 9, 10, 5, 11, 6, 7, 8, 12, 9, 13, 10, 14, 11, 15, 0, 16, 17, 12, 13, 14, 15, 18, 16, 17, 18, 19, 1, 20, 19, 20, 21, 21, 22, 22, 23, 24, 25, 23, 26, 27, 28, 29, 30, 24, 2, 25, 31, 32, 26, 33, 3, 27, 34, 35, 4, 28, 36, 29, 37, 38, 39, 40, 5, 30, 41]

cp's OEIS Frontend

A334655 Number of integers less than n with the same number of distinct prime factors as n.

Table of values

List of values

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

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

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