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.

A335681 Array read by antidiagonals: T(m,n) (m>=1, n>=1) = number of interior vertices in figure formed by taking m equally spaced points on a line and n equally spaced points on a parallel line, and joining each of the m points to each of the n points by a line segment.

Table of values

n a(n)
1 0
2 0
3 0
4 0
5 1
6 0
7 0
8 3
9 3
10 0
11 0
12 6
13 7
14 6
15 0
16 0
17 10
18 14
19 14
20 10
21 0
22 0
23 15
24 22
25 27
26 22
27 15
28 0
29 0
30 21
31 33
32 42
33 42
34 33
35 21
36 0
37 0
38 28
39 45
40 63
41 65
42 63
43 45
44 28
45 0
46 0
47 36
48 60
49 85
50 98
51 98
52 85
53 60
54 36
55 0
56 0
57 45
58 76
59 113
60 131
61 147
62 131
63 113
64 76
65 45
66 0
67 0
68 55
69 95
70 143
71 174
72 196
73 196
74 174
75 143
76 95
77 55
78 0

List of values

[0, 0, 0, 0, 1, 0, 0, 3, 3, 0, 0, 6, 7, 6, 0, 0, 10, 14, 14, 10, 0, 0, 15, 22, 27, 22, 15, 0, 0, 21, 33, 42, 42, 33, 21, 0, 0, 28, 45, 63, 65, 63, 45, 28, 0, 0, 36, 60, 85, 98, 98, 85, 60, 36, 0, 0, 45, 76, 113, 131, 147, 131, 113, 76, 45, 0, 0, 55, 95, 143, 174, 196, 196, 174, 143, 95, 55, 0]