A074840 - OEIS

A074840 as a simple table

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

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

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

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

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