A005670 - OEIS

A005670 as a simple table

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

[1,4,6,7,8,9,9,10,10,11,11,11,11,12,12,12,12,13, 13,13,13,13,13,14,14,14,14,14,14,15,15,15,15,15, 15,15,15,15,15,16,15,16,16,16,16,16,16,16,16,16, 16,16,16,17,17,17,17,17,17,17,17,17,17,17,17,17, 17,17]

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

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

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