A384058 - cp's OEIS frontend

A384058 The number of integers k from 1 to n such that the greatest divisor of k that is a unitary divisor of n is a 5-rough number (A007310).

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

[1, 1, 2, 3, 5, 2, 7, 7, 8, 5, 11, 6, 13, 7, 10, 15, 17, 8, 19, 15, 14, 11, 23, 14, 25, 13, 26, 21, 29, 10, 31, 31, 22, 17, 35, 24, 37, 19, 26, 35, 41, 14, 43, 33, 40, 23, 47, 30, 49, 25, 34, 39, 53, 26, 55, 49, 38, 29, 59, 30, 61, 31, 56, 63, 65, 22, 67, 51, 46]

cp's OEIS Frontend

A384058 The number of integers k from 1 to n such that the greatest divisor of k that is a unitary divisor of n is a 5-rough number (A007310).

Table of values

List of values

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

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

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