A007963 - OEIS

A007963 as a simple table

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

[0,0,0,0,1,1,2,2,3,3,4,4,5,6,7,6,8,7,9,10,10,10, 11,12,12,14,16,14,16,16,16,18,20,20,20,21,21,21, 27,24,25,28,27,28,33,29,32,35,34,30,37,36,34,42, 38,36,46,42,42,50,46,47,53,50,45,56,54,46,62,53, 48,64,59,55,68,61,59,68]

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

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

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