A121856 - OEIS

A121856 as a simple table

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

[0,2,3,4,5,6,6,7,7,8,8,9,9,9,10,10,10,11,11,11,12, 12,12,13,13,13,13,14,14,14,14,15,15,15,15,16,16, 16,16,16,17,17,17,17,18,18,18,18,18,19,19,19,19, 19,19,20,20,20,20,20,21,21,21,21,21,21,22,22,22, 22,22,22,23,23]

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

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

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