A047785 - cp's OEIS frontend

A047785 a(n) = ceiling(Li(n)).

n	a(n)
2	2
3	3
4	3
5	4
6	5
7	5
8	6
9	6
10	7
11	7
12	8
13	8
14	8
15	9
16	9
17	9
18	10
19	10
20	10
21	11
22	11
23	11
24	12
25	12
26	12
27	13
28	13
29	13
30	14
31	14
32	14
33	14
34	15
35	15
36	15
37	16
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	19
53	20
54	20
55	20
56	20
57	21
58	21
59	21
60	21
61	22
62	22
63	22
64	22
65	23
66	23
67	23
68	23
69	24

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

cp's OEIS Frontend

A047785 a(n) = ceiling(Li(n)).

Table of values

List of values

n	a(n)
2	2
3	3
4	3
5	4
6	5
7	5
8	6
9	6
10	7
11	7
12	8
13	8
14	8
15	9
16	9
17	9
18	10
19	10
20	10
21	11
22	11
23	11
24	12
25	12
26	12
27	13
28	13
29	13
30	14
31	14
32	14
33	14
34	15
35	15
36	15
37	16
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	19
53	20
54	20
55	20
56	20
57	21
58	21
59	21
60	21
61	22
62	22
63	22
64	22
65	23
66	23
67	23
68	23
69	24

n	a(n)
2	2
3	3
4	3
5	4
6	5
7	5
8	6
9	6
10	7
11	7
12	8
13	8
14	8
15	9
16	9
17	9
18	10
19	10
20	10
21	11
22	11
23	11
24	12
25	12
26	12
27	13
28	13
29	13
30	14
31	14
32	14
33	14
34	15
35	15
36	15
37	16
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	19
53	20
54	20
55	20
56	20
57	21
58	21
59	21
60	21
61	22
62	22
63	22
64	22
65	23
66	23
67	23
68	23
69	24

n	a(n)
2	2
3	3
4	3
5	4
6	5
7	5
8	6
9	6
10	7
11	7
12	8
13	8
14	8
15	9
16	9
17	9
18	10
19	10
20	10
21	11
22	11
23	11
24	12
25	12
26	12
27	13
28	13
29	13
30	14
31	14
32	14
33	14
34	15
35	15
36	15
37	16
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	19
53	20
54	20
55	20
56	20
57	21
58	21
59	21
60	21
61	22
62	22
63	22
64	22
65	23
66	23
67	23
68	23
69	24