A377734 - cp's OEIS frontend

A377734 Number of integers less than n that have the same smallest prime factor as n.

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

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

cp's OEIS Frontend

A377734 Number of integers less than n that have the same smallest prime factor as n.

Table of values

List of values

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

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

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