A089575 - OEIS

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A089575 as a simple table

n	a(n)
0	0
1	1
2	2
3	2
4	3
5	4
6	4
7	5
8	5
9	5
10	6
11	6
12	7
13	8
14	8
15	9
16	9
17	9
18	9
19	9
20	10
21	11
22	11
23	12
24	12
25	12
26	12
27	13
28	13
29	14
30	14
31	14
32	14
33	14
34	15
35	16
36	16
37	16
38	16
39	17
40	17
41	17
42	18
43	19
44	19
45	19

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

n	a(n)
0	0
1	1
2	2
3	2
4	3
5	4
6	4
7	5
8	5
9	5
10	6
11	6
12	7
13	8
14	8
15	9
16	9
17	9
18	9
19	9
20	10
21	11
22	11
23	12
24	12
25	12
26	12
27	13
28	13
29	14
30	14
31	14
32	14
33	14
34	15
35	16
36	16
37	16
38	16
39	17
40	17
41	17
42	18
43	19
44	19
45	19

n	a(n)
0	0
1	1
2	2
3	2
4	3
5	4
6	4
7	5
8	5
9	5
10	6
11	6
12	7
13	8
14	8
15	9
16	9
17	9
18	9
19	9
20	10
21	11
22	11
23	12
24	12
25	12
26	12
27	13
28	13
29	14
30	14
31	14
32	14
33	14
34	15
35	16
36	16
37	16
38	16
39	17
40	17
41	17
42	18
43	19
44	19
45	19

n	a(n)
0	0
1	1
2	2
3	2
4	3
5	4
6	4
7	5
8	5
9	5
10	6
11	6
12	7
13	8
14	8
15	9
16	9
17	9
18	9
19	9
20	10
21	11
22	11
23	12
24	12
25	12
26	12
27	13
28	13
29	14
30	14
31	14
32	14
33	14
34	15
35	16
36	16
37	16
38	16
39	17
40	17
41	17
42	18
43	19
44	19
45	19