A334043 - cp's OEIS frontend

A334043 a(1) = 0, and for any n > 1, a(n) is the number of points of the set { (k, a(k)), k = 1..n-2 } that are visible from the point (n-1, a(n-1)).

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

[0, 0, 1, 2, 2, 3, 5, 4, 5, 7, 8, 8, 10, 8, 9, 12, 11, 13, 16, 14, 15, 16, 14, 17, 20, 20, 17, 21, 25, 23, 26, 28, 27, 25, 29, 25, 31, 27, 34, 34, 28, 39, 35, 36, 41, 36, 40, 41, 41, 42, 45, 35, 49, 45, 47, 46, 49, 47, 49, 47, 54, 54, 52, 56, 54, 54, 58, 56, 59]

cp's OEIS Frontend

A334043 a(1) = 0, and for any n > 1, a(n) is the number of points of the set { (k, a(k)), k = 1..n-2 } that are visible from the point (n-1, a(n-1)).

Table of values

List of values

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

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

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