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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.

A279415 Triangle read by rows: T(n,k), n>=k>=1, is the number of right isosceles triangles with integral coordinates that have a bounding box of size n X k.

Table of values

n a(n)
1 0
2 0
3 4
4 0
5 2
6 4
7 0
8 0
9 4
10 4
11 0
12 0
13 2
14 4
15 4
16 0
17 0
18 0
19 4
20 4
21 4
22 0
23 0
24 0
25 2
26 4
27 4
28 4
29 0
30 0
31 0
32 0
33 4
34 4
35 4
36 4
37 0
38 0
39 0
40 0
41 2
42 4
43 4
44 4
45 4
46 0
47 0
48 0
49 0
50 0
51 4
52 4
53 4
54 4
55 4
56 0
57 0
58 0
59 0
60 0
61 2
62 4
63 4
64 4
65 4
66 4
67 0
68 0
69 0
70 0
71 0
72 0
73 4
74 4
75 4
76 4
77 4
78 4
79 0
80 0
81 0
82 0
83 0
84 0
85 2
86 4
87 4

List of values

[0, 0, 4, 0, 2, 4, 0, 0, 4, 4, 0, 0, 2, 4, 4, 0, 0, 0, 4, 4, 4, 0, 0, 0, 2, 4, 4, 4, 0, 0, 0, 0, 4, 4, 4, 4, 0, 0, 0, 0, 2, 4, 4, 4, 4, 0, 0, 0, 0, 0, 4, 4, 4, 4, 4, 0, 0, 0, 0, 0, 2, 4, 4, 4, 4, 4, 0, 0, 0, 0, 0, 0, 4, 4, 4, 4, 4, 4, 0, 0, 0, 0, 0, 0, 2, 4, 4]

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