A064506 - OEIS

A064506 as a simple table

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

[0,1,2,2,3,4,4,5,6,6,7,8,9,9,10,11,11,12,13,14,14, 15,16,16,17,18,18,19,20,21,21,22,23,23,24,25,26, 26,27,28,28,29,30,30,31,32,33,33,34,35,35,36,37, 38,38,39,40,40,41,42,42,43,44,45,45,46,47,47,48, 49,50,50,51,52]

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

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

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