A071823 - OEIS

A071823 as a simple table

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

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

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

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

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