A271910 - cp's OEIS frontend

A271910 Array read by antidiagonals: T(n,k) = number of ways to choose 3 distinct points from an n X k rectangular grid so that they form an isosceles triangle.

n	a(n)
1	0
2	0
3	0
4	0
5	4
6	0
7	0
8	10
9	10
10	0
11	0
12	16
13	36
14	16
15	0
16	0
17	24
18	68
19	68
20	24
21	0
22	0
23	32
24	108
25	148
26	108
27	32
28	0
29	0
30	42
31	150
32	248
33	248
34	150
35	42
36	0
37	0
38	52
39	200
40	360
41	444
42	360
43	200
44	52
45	0
46	0
47	64
48	252
49	488
50	672
51	672
52	488
53	252
54	64
55	0
56	0
57	76
58	312
59	620
60	932
61	1064
62	932
63	620
64	312
65	76
66	0

[0, 0, 0, 0, 4, 0, 0, 10, 10, 0, 0, 16, 36, 16, 0, 0, 24, 68, 68, 24, 0, 0, 32, 108, 148, 108, 32, 0, 0, 42, 150, 248, 248, 150, 42, 0, 0, 52, 200, 360, 444, 360, 200, 52, 0, 0, 64, 252, 488, 672, 672, 488, 252, 64, 0, 0, 76, 312, 620, 932, 1064, 932, 620, 312, 76, 0]

cp's OEIS Frontend

A271910 Array read by antidiagonals: T(n,k) = number of ways to choose 3 distinct points from an n X k rectangular grid so that they form an isosceles triangle.

Table of values

List of values