A072749 - cp's OEIS frontend

A072749 Count of factors of 5 in the first n squarefree numbers.

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	1
7	2
8	2
9	2
10	2
11	3
12	3
13	3
14	3
15	3
16	3
17	3
18	3
19	4
20	4
21	4
22	4
23	5
24	5
25	5
26	5
27	5
28	5
29	5
30	5
31	5
32	5
33	5
34	6
35	6
36	6
37	6
38	6
39	6
40	7
41	7
42	7
43	7
44	8
45	8
46	8
47	8
48	8
49	8
50	8
51	8
52	8
53	9
54	9
55	9
56	9
57	9
58	9
59	9
60	10
61	10
62	10
63	10
64	10
65	11
66	11
67	11
68	11
69	12
70	12
71	12
72	12
73	13
74	13
75	13
76	13
77	13
78	13
79	13
80	14
81	14
82	14
83	14
84	14
85	14
86	14
87	14
88	14
89	14

[0, 0, 0, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 11, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14]

cp's OEIS Frontend

A072749 Count of factors of 5 in the first n squarefree numbers.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	1
7	2
8	2
9	2
10	2
11	3
12	3
13	3
14	3
15	3
16	3
17	3
18	3
19	4
20	4
21	4
22	4
23	5
24	5
25	5
26	5
27	5
28	5
29	5
30	5
31	5
32	5
33	5
34	6
35	6
36	6
37	6
38	6
39	6
40	7
41	7
42	7
43	7
44	8
45	8
46	8
47	8
48	8
49	8
50	8
51	8
52	8
53	9
54	9
55	9
56	9
57	9
58	9
59	9
60	10
61	10
62	10
63	10
64	10
65	11
66	11
67	11
68	11
69	12
70	12
71	12
72	12
73	13
74	13
75	13
76	13
77	13
78	13
79	13
80	14
81	14
82	14
83	14
84	14
85	14
86	14
87	14
88	14
89	14

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	1
7	2
8	2
9	2
10	2
11	3
12	3
13	3
14	3
15	3
16	3
17	3
18	3
19	4
20	4
21	4
22	4
23	5
24	5
25	5
26	5
27	5
28	5
29	5
30	5
31	5
32	5
33	5
34	6
35	6
36	6
37	6
38	6
39	6
40	7
41	7
42	7
43	7
44	8
45	8
46	8
47	8
48	8
49	8
50	8
51	8
52	8
53	9
54	9
55	9
56	9
57	9
58	9
59	9
60	10
61	10
62	10
63	10
64	10
65	11
66	11
67	11
68	11
69	12
70	12
71	12
72	12
73	13
74	13
75	13
76	13
77	13
78	13
79	13
80	14
81	14
82	14
83	14
84	14
85	14
86	14
87	14
88	14
89	14

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	1
7	2
8	2
9	2
10	2
11	3
12	3
13	3
14	3
15	3
16	3
17	3
18	3
19	4
20	4
21	4
22	4
23	5
24	5
25	5
26	5
27	5
28	5
29	5
30	5
31	5
32	5
33	5
34	6
35	6
36	6
37	6
38	6
39	6
40	7
41	7
42	7
43	7
44	8
45	8
46	8
47	8
48	8
49	8
50	8
51	8
52	8
53	9
54	9
55	9
56	9
57	9
58	9
59	9
60	10
61	10
62	10
63	10
64	10
65	11
66	11
67	11
68	11
69	12
70	12
71	12
72	12
73	13
74	13
75	13
76	13
77	13
78	13
79	13
80	14
81	14
82	14
83	14
84	14
85	14
86	14
87	14
88	14
89	14