A047742 - OEIS

A047742 as a simple table

n	a(n)
2	2
3	3
4	4
5	4
6	5
7	5
8	6
9	6
10	7
11	7
12	7
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	13
31	14
32	14
33	14
34	15
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	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

[2,3,4,4,5,5,6,6,7,7,7,8,8,9,9,9,10,10,10,11,11, 11,12,12,12,13,13,13,13,14,14,14,15,15,15,15,16, 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]

n	a(n)
2	2
3	3
4	4
5	4
6	5
7	5
8	6
9	6
10	7
11	7
12	7
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	13
31	14
32	14
33	14
34	15
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	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	4
5	4
6	5
7	5
8	6
9	6
10	7
11	7
12	7
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	13
31	14
32	14
33	14
34	15
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	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	4
5	4
6	5
7	5
8	6
9	6
10	7
11	7
12	7
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	13
31	14
32	14
33	14
34	15
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	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