cp's OEIS Frontend

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.

A279433 Triangle read by rows: T(n,k), n>=k>=1, is the number of right 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 6
6 4
7 0
8 4
9 12
10 4
11 0
12 4
13 6
14 12
15 12
16 0
17 4
18 8
19 12
20 12
21 4
22 0
23 4
24 4
25 6
26 12
27 20
28 4
29 0
30 4
31 4
32 12
33 12
34 12
35 20
36 4
37 0
38 4
39 4
40 4
41 14
42 12
43 20
44 12
45 12
46 0
47 4
48 4
49 4
50 12
51 12
52 16
53 12
54 12
55 20
56 0
57 4
58 4
59 8
60 8
61 6
62 12
63 20
64 20
65 20
66 4
67 0
68 4
69 4
70 4
71 4
72 12
73 28
74 12
75 12
76 12

List of values

[0, 0, 4, 0, 6, 4, 0, 4, 12, 4, 0, 4, 6, 12, 12, 0, 4, 8, 12, 12, 4, 0, 4, 4, 6, 12, 20, 4, 0, 4, 4, 12, 12, 12, 20, 4, 0, 4, 4, 4, 14, 12, 20, 12, 12, 0, 4, 4, 4, 12, 12, 16, 12, 12, 20, 0, 4, 4, 8, 8, 6, 12, 20, 20, 20, 4, 0, 4, 4, 4, 4, 12, 28, 12, 12, 12]

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

Content is available under The OEIS End-User License Agreement.