A320310 - cp's OEIS frontend

A320310 (1/4) * number of ways to select 3 distinct points forming a triangle of unsigned area = n/2 from a square of grid points with side length n.

n	a(n)
1	1
2	8
3	23
4	82
5	114
6	416
7	373
8	1149
9	1351
10	2598
11	2113
12	7158
13	4094
14	9344
15	11528
16	18243
17	11882
18	33006
19	18603
20	48760
21	42102
22	54312
23	40061
24	121728
25	68115
26	105204
27	112546
28	178322
29	101798
30	284980
31	133229
32	300367
33	247900
34	305062
35	295972
36	625544
37	271864
38	475004
39	479658
40	847208

[1, 8, 23, 82, 114, 416, 373, 1149, 1351, 2598, 2113, 7158, 4094, 9344, 11528, 18243, 11882, 33006, 18603, 48760, 42102, 54312, 40061, 121728, 68115, 105204, 112546, 178322, 101798, 284980, 133229, 300367, 247900, 305062, 295972, 625544, 271864, 475004, 479658, 847208]

cp's OEIS Frontend

A320310 (1/4) * number of ways to select 3 distinct points forming a triangle of unsigned area = n/2 from a square of grid points with side length n.

Table of values

List of values