A280652 - cp's OEIS frontend

A280652 Triangle read by rows: T(n,k), n>=k>=1, is the number of obtuse triangles with integer coordinates that have a bounding box of size n X k.

n	a(n)
1	0
2	0
3	0
4	0
5	4
6	8
7	0
8	12
9	16
10	20
11	0
12	18
13	32
14	36
15	36
16	0
17	24
18	48
19	56
20	60
21	72
22	0
23	30
24	62
25	76
26	84
27	88
28	104
29	0
30	36
31	76
32	104
33	112
34	120
35	132
36	140
37	0
38	42
39	86
40	130
41	136
42	152
43	160
44	184
45	180
46	0
47	48
48	100
49	144
50	180
51	184
52	192
53	216
54	232
55	240
56	0
57	54
58	110
59	166
60	210
61	228
62	232

[0, 0, 0, 0, 4, 8, 0, 12, 16, 20, 0, 18, 32, 36, 36, 0, 24, 48, 56, 60, 72, 0, 30, 62, 76, 84, 88, 104, 0, 36, 76, 104, 112, 120, 132, 140, 0, 42, 86, 130, 136, 152, 160, 184, 180, 0, 48, 100, 144, 180, 184, 192, 216, 232, 240, 0, 54, 110, 166, 210, 228, 232]

cp's OEIS Frontend

A280652 Triangle read by rows: T(n,k), n>=k>=1, is the number of obtuse triangles with integer coordinates that have a bounding box of size n X k.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	4
6	8
7	0
8	12
9	16
10	20
11	0
12	18
13	32
14	36
15	36
16	0
17	24
18	48
19	56
20	60
21	72
22	0
23	30
24	62
25	76
26	84
27	88
28	104
29	0
30	36
31	76
32	104
33	112
34	120
35	132
36	140
37	0
38	42
39	86
40	130
41	136
42	152
43	160
44	184
45	180
46	0
47	48
48	100
49	144
50	180
51	184
52	192
53	216
54	232
55	240
56	0
57	54
58	110
59	166
60	210
61	228
62	232

n	a(n)
1	0
2	0
3	0
4	0
5	4
6	8
7	0
8	12
9	16
10	20
11	0
12	18
13	32
14	36
15	36
16	0
17	24
18	48
19	56
20	60
21	72
22	0
23	30
24	62
25	76
26	84
27	88
28	104
29	0
30	36
31	76
32	104
33	112
34	120
35	132
36	140
37	0
38	42
39	86
40	130
41	136
42	152
43	160
44	184
45	180
46	0
47	48
48	100
49	144
50	180
51	184
52	192
53	216
54	232
55	240
56	0
57	54
58	110
59	166
60	210
61	228
62	232

n	a(n)
1	0
2	0
3	0
4	0
5	4
6	8
7	0
8	12
9	16
10	20
11	0
12	18
13	32
14	36
15	36
16	0
17	24
18	48
19	56
20	60
21	72
22	0
23	30
24	62
25	76
26	84
27	88
28	104
29	0
30	36
31	76
32	104
33	112
34	120
35	132
36	140
37	0
38	42
39	86
40	130
41	136
42	152
43	160
44	184
45	180
46	0
47	48
48	100
49	144
50	180
51	184
52	192
53	216
54	232
55	240
56	0
57	54
58	110
59	166
60	210
61	228
62	232