A190021 - cp's OEIS frontend

A190021 Number of acute triangles, distinct up to congruence, on an n X n grid (or geoboard).

n	a(n)
1	0
2	0
3	2
4	8
5	23
6	51
7	101
8	179
9	295
10	460
11	688
12	988
13	1382
14	1876
15	2495
16	3258
17	4191
18	5298
19	6613
20	8166
21	9973
22	12065
23	14472
24	17208
25	20341
26	23873
27	27838
28	32282
29	37238
30	42734
31	48840
32	55573
33	62973
34	71067
35	79934
36	89640
37	100172
38	111613
39	123959
40	137336
41	151842

[0, 0, 2, 8, 23, 51, 101, 179, 295, 460, 688, 988, 1382, 1876, 2495, 3258, 4191, 5298, 6613, 8166, 9973, 12065, 14472, 17208, 20341, 23873, 27838, 32282, 37238, 42734, 48840, 55573, 62973, 71067, 79934, 89640, 100172, 111613, 123959, 137336, 151842]

cp's OEIS Frontend

A190021 Number of acute triangles, distinct up to congruence, on an n X n grid (or geoboard).

Table of values

List of values