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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.

A384125 Array read by antidiagonals: T(n,m) is the number of edges in the n X m rook graph K_n X K_m.

Table of values

n a(n)
1 0
2 1
3 1
4 3
5 4
6 3
7 6
8 9
9 9
10 6
11 10
12 16
13 18
14 16
15 10
16 15
17 25
18 30
19 30
20 25
21 15
22 21
23 36
24 45
25 48
26 45
27 36
28 21
29 28
30 49
31 63
32 70
33 70
34 63
35 49
36 28
37 36
38 64
39 84
40 96
41 100
42 96
43 84
44 64
45 36
46 45
47 81
48 108
49 126
50 135
51 135
52 126
53 108
54 81
55 45
56 55
57 100
58 135
59 160
60 175
61 180
62 175
63 160
64 135
65 100
66 55

List of values

[0, 1, 1, 3, 4, 3, 6, 9, 9, 6, 10, 16, 18, 16, 10, 15, 25, 30, 30, 25, 15, 21, 36, 45, 48, 45, 36, 21, 28, 49, 63, 70, 70, 63, 49, 28, 36, 64, 84, 96, 100, 96, 84, 64, 36, 45, 81, 108, 126, 135, 135, 126, 108, 81, 45, 55, 100, 135, 160, 175, 180, 175, 160, 135, 100, 55]

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

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