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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.

A018812 Number of lines through exactly 5 points of an n X n grid of points.

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 0
5 12
6 4
7 4
8 4
9 24
10 52
11 40
12 20
13 76
14 148
15 236
16 204
17 228
18 252
19 356
20 476
21 612
22 764
23 932
24 1116
25 1524
26 1548
27 1556
28 1548
29 1884
30 2252
31 2652
32 3084
33 3820
34 4620
35 5484
36 5524
37 6140
38 6788
39 7468
40 8180
41 8588
42 8996
43 9932
44 10916
45 12868
46 13820
47 14804
48 15820
49 17668

List of values

[0, 0, 0, 0, 0, 12, 4, 4, 4, 24, 52, 40, 20, 76, 148, 236, 204, 228, 252, 356, 476, 612, 764, 932, 1116, 1524, 1548, 1556, 1548, 1884, 2252, 2652, 3084, 3820, 4620, 5484, 5524, 6140, 6788, 7468, 8180, 8588, 8996, 9932, 10916, 12868, 13820, 14804, 15820, 17668]

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

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