A013941 - cp's OEIS frontend

A013941 a(n) = Sum_{k = 1..n} floor(n/prime(k)^3).

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

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

cp's OEIS Frontend

A013941 a(n) = Sum_{k = 1..n} floor(n/prime(k)^3).

Table of values

List of values

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

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

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