A064817 - OEIS

A064817 as a simple table

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

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

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

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

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