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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A028419 Congruence classes of triangles which can be drawn using lattice points in n X n grid as vertices.

Table of values

n a(n)
0 0
1 1
2 8
3 29
4 79
5 172
6 333
7 587
8 963
9 1494
10 2228
11 3195
12 4455
13 6050
14 8032
15 10481
16 13464
17 17014
18 21235
19 26190
20 31980
21 38666
22 46388
23 55144
24 65131
25 76449
26 89132
27 103337
28 119184
29 136757
30 156280
31 177796
32 201430
33 227331
34 255668
35 286606
36 320294
37 356884
38 396376
39 439100
40 485427
41 535049
42 588457
43 645803

List of values

[0, 1, 8, 29, 79, 172, 333, 587, 963, 1494, 2228, 3195, 4455, 6050, 8032, 10481, 13464, 17014, 21235, 26190, 31980, 38666, 46388, 55144, 65131, 76449, 89132, 103337, 119184, 136757, 156280, 177796, 201430, 227331, 255668, 286606, 320294, 356884, 396376, 439100, 485427, 535049, 588457, 645803]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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