A049639 - cp's OEIS frontend

A049639 Array T read by diagonals; T(i,j) = number of lines passing through (i,j) and at least two other lattice points (h,k) satisfying 0<=h<=i, 0<=k<=j.

n	a(n)
0	0
1	0
2	0
3	1
4	0
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	3
13	1
14	1
15	1
16	1
17	3
18	3
19	1
20	1
21	1
22	1
23	4
24	3
25	4
26	1
27	1
28	1
29	1
30	4
31	4
32	4
33	4
34	1
35	1
36	1
37	1
38	5
39	4
40	5
41	4
42	5
43	1
44	1
45	1
46	1
47	5
48	5
49	5
50	5
51	5
52	5
53	1
54	1
55	1
56	1
57	6
58	5
59	7
60	5
61	7
62	5
63	6
64	1
65	1
66	1
67	1
68	6
69	6
70	7
71	7
72	7
73	7
74	6
75	6
76	1
77	1
78	1
79	1
80	7
81	6
82	8
83	7
84	9
85	7
86	8
87	6
88	7
89	1
90	1

[0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 3, 3, 1, 1, 1, 1, 4, 3, 4, 1, 1, 1, 1, 4, 4, 4, 4, 1, 1, 1, 1, 5, 4, 5, 4, 5, 1, 1, 1, 1, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 6, 5, 7, 5, 7, 5, 6, 1, 1, 1, 1, 6, 6, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 7, 6, 8, 7, 9, 7, 8, 6, 7, 1, 1]

cp's OEIS Frontend

A049639 Array T read by diagonals; T(i,j) = number of lines passing through (i,j) and at least two other lattice points (h,k) satisfying 0<=h<=i, 0<=k<=j.

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	1
4	0
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	3
13	1
14	1
15	1
16	1
17	3
18	3
19	1
20	1
21	1
22	1
23	4
24	3
25	4
26	1
27	1
28	1
29	1
30	4
31	4
32	4
33	4
34	1
35	1
36	1
37	1
38	5
39	4
40	5
41	4
42	5
43	1
44	1
45	1
46	1
47	5
48	5
49	5
50	5
51	5
52	5
53	1
54	1
55	1
56	1
57	6
58	5
59	7
60	5
61	7
62	5
63	6
64	1
65	1
66	1
67	1
68	6
69	6
70	7
71	7
72	7
73	7
74	6
75	6
76	1
77	1
78	1
79	1
80	7
81	6
82	8
83	7
84	9
85	7
86	8
87	6
88	7
89	1
90	1

n	a(n)
0	0
1	0
2	0
3	1
4	0
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	3
13	1
14	1
15	1
16	1
17	3
18	3
19	1
20	1
21	1
22	1
23	4
24	3
25	4
26	1
27	1
28	1
29	1
30	4
31	4
32	4
33	4
34	1
35	1
36	1
37	1
38	5
39	4
40	5
41	4
42	5
43	1
44	1
45	1
46	1
47	5
48	5
49	5
50	5
51	5
52	5
53	1
54	1
55	1
56	1
57	6
58	5
59	7
60	5
61	7
62	5
63	6
64	1
65	1
66	1
67	1
68	6
69	6
70	7
71	7
72	7
73	7
74	6
75	6
76	1
77	1
78	1
79	1
80	7
81	6
82	8
83	7
84	9
85	7
86	8
87	6
88	7
89	1
90	1

n	a(n)
0	0
1	0
2	0
3	1
4	0
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	3
13	1
14	1
15	1
16	1
17	3
18	3
19	1
20	1
21	1
22	1
23	4
24	3
25	4
26	1
27	1
28	1
29	1
30	4
31	4
32	4
33	4
34	1
35	1
36	1
37	1
38	5
39	4
40	5
41	4
42	5
43	1
44	1
45	1
46	1
47	5
48	5
49	5
50	5
51	5
52	5
53	1
54	1
55	1
56	1
57	6
58	5
59	7
60	5
61	7
62	5
63	6
64	1
65	1
66	1
67	1
68	6
69	6
70	7
71	7
72	7
73	7
74	6
75	6
76	1
77	1
78	1
79	1
80	7
81	6
82	8
83	7
84	9
85	7
86	8
87	6
88	7
89	1
90	1