A357241 - cp's OEIS frontend

A357241 a(n) is the number of j in the range 1 <= j <= n such that j / rad(j) = n / rad(n).

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

[1, 2, 3, 1, 4, 5, 6, 1, 1, 7, 8, 2, 9, 10, 11, 1, 12, 2, 13, 3, 14, 15, 16, 2, 1, 17, 1, 4, 18, 19, 20, 1, 21, 22, 23, 1, 24, 25, 26, 3, 27, 28, 29, 5, 3, 30, 31, 2, 1, 2, 32, 6, 33, 2, 34, 4, 35, 36, 37, 7, 38, 39, 4, 1, 40, 41, 42, 8, 43, 44, 45, 1, 46, 47, 3, 9, 48, 49, 50, 3]

cp's OEIS Frontend

A357241 a(n) is the number of j in the range 1 <= j <= n such that j / rad(j) = n / rad(n).

Table of values

List of values

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

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

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