A043267 - OEIS

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A043267 as a simple table

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

[0,1,2,3,4,5,6,7,2,4,6,8,10,12,14,2,3,4,5,6,7,8,9, 4,5,6,7,8,9,10,11,6,7,8,9,10,11,12,13,8,9,10,11, 12,13,14,15,10,11,12,13,14,15,16,17,12,13,14,15, 16,17,18,19,14,15,16,17,18,19,20,21]

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

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

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