A067086 - cp's OEIS frontend

A067086 a(n) = floor(Sum_{k=1..n} 1/k^(1/3)).

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

[1, 1, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 7, 8, 8, 9, 9, 9, 10, 10, 10, 11, 11, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 15, 15, 15, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23, 24, 24, 24, 24, 25, 25, 25, 25]

cp's OEIS Frontend

A067086 a(n) = floor(Sum_{k=1..n} 1/k^(1/3)).

Table of values

List of values

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

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

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