A385198 - cp's OEIS frontend

A385198 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 prime power (A246655).

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

[0, 1, 1, 1, 1, 3, 1, 1, 1, 5, 1, 5, 1, 7, 6, 1, 1, 9, 1, 7, 8, 11, 1, 9, 1, 13, 1, 9, 1, 14, 1, 1, 12, 17, 10, 11, 1, 19, 14, 11, 1, 20, 1, 13, 12, 23, 1, 17, 1, 25, 18, 15, 1, 27, 14, 13, 20, 29, 1, 26, 1, 31, 14, 1, 16, 32, 1, 19, 24, 34, 1, 15, 1, 37, 26, 21]

cp's OEIS Frontend

A385198 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 prime power (A246655).

Table of values

List of values

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

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

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