A073869 - OEIS

A073869 as a simple table

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

[0,1,1,2,3,3,4,4,5,6,6,7,8,8,9,9,10,11,11,12,12, 13,14,14,15,16,16,17,17,18,19,19,20,21,21,22,22, 23,24,24,25,25,26,27,27,28,29,29,30,30,31,32,32, 33,33,34,35,35,36,37,37,38,38,39,40,40,41,42]

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

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

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