A030530 - OEIS

A030530 as a simple table

n	a(n)
0	0
1	1
2	2
3	2
4	3
5	3
6	4
7	4
8	4
9	5
10	5
11	5
12	6
13	6
14	6
15	7
16	7
17	7
18	8
19	8
20	8
21	8
22	9
23	9
24	9
25	9
26	10
27	10
28	10
29	10
30	11
31	11
32	11
33	11
34	12
35	12
36	12
37	12
38	13
39	13
40	13
41	13
42	14
43	14
44	14
45	14
46	15
47	15
48	15
49	15
50	16
51	16
52	16
53	16
54	16
55	17
56	17
57	17
58	17
59	17
60	18
61	18
62	18
63	18
64	18
65	19
66	19
67	19
68	19
69	19
70	20
71	20
72	20
73	20
74	20
75	21
76	21
77	21

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

n	a(n)
0	0
1	1
2	2
3	2
4	3
5	3
6	4
7	4
8	4
9	5
10	5
11	5
12	6
13	6
14	6
15	7
16	7
17	7
18	8
19	8
20	8
21	8
22	9
23	9
24	9
25	9
26	10
27	10
28	10
29	10
30	11
31	11
32	11
33	11
34	12
35	12
36	12
37	12
38	13
39	13
40	13
41	13
42	14
43	14
44	14
45	14
46	15
47	15
48	15
49	15
50	16
51	16
52	16
53	16
54	16
55	17
56	17
57	17
58	17
59	17
60	18
61	18
62	18
63	18
64	18
65	19
66	19
67	19
68	19
69	19
70	20
71	20
72	20
73	20
74	20
75	21
76	21
77	21

n	a(n)
0	0
1	1
2	2
3	2
4	3
5	3
6	4
7	4
8	4
9	5
10	5
11	5
12	6
13	6
14	6
15	7
16	7
17	7
18	8
19	8
20	8
21	8
22	9
23	9
24	9
25	9
26	10
27	10
28	10
29	10
30	11
31	11
32	11
33	11
34	12
35	12
36	12
37	12
38	13
39	13
40	13
41	13
42	14
43	14
44	14
45	14
46	15
47	15
48	15
49	15
50	16
51	16
52	16
53	16
54	16
55	17
56	17
57	17
58	17
59	17
60	18
61	18
62	18
63	18
64	18
65	19
66	19
67	19
68	19
69	19
70	20
71	20
72	20
73	20
74	20
75	21
76	21
77	21

n	a(n)
0	0
1	1
2	2
3	2
4	3
5	3
6	4
7	4
8	4
9	5
10	5
11	5
12	6
13	6
14	6
15	7
16	7
17	7
18	8
19	8
20	8
21	8
22	9
23	9
24	9
25	9
26	10
27	10
28	10
29	10
30	11
31	11
32	11
33	11
34	12
35	12
36	12
37	12
38	13
39	13
40	13
41	13
42	14
43	14
44	14
45	14
46	15
47	15
48	15
49	15
50	16
51	16
52	16
53	16
54	16
55	17
56	17
57	17
58	17
59	17
60	18
61	18
62	18
63	18
64	18
65	19
66	19
67	19
68	19
69	19
70	20
71	20
72	20
73	20
74	20
75	21
76	21
77	21