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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.

A270227 Array read by antidiagonals: T(n,m) is the number of matchings in the rook graph K_n X K_m.

Table of values

n a(n)
1 1
2 2
3 2
4 4
5 7
6 4
7 10
8 32
9 32
10 10
11 26
12 193
13 370
14 193
15 26
16 76
17 1382
18 5950
19 5950
20 1382
21 76
22 232
23 11719
24 122984
25 270529
26 122984
27 11719
28 232
29 764
30 112604
31 3175696
32 16873930
33 16873930
34 3175696
35 112604
36 764
37 2620
38 1221889
39 98815588
40 1384880065
41 3337807996
42 1384880065
43 98815588
44 1221889
45 2620

List of values

[1, 2, 2, 4, 7, 4, 10, 32, 32, 10, 26, 193, 370, 193, 26, 76, 1382, 5950, 5950, 1382, 76, 232, 11719, 122984, 270529, 122984, 11719, 232, 764, 112604, 3175696, 16873930, 16873930, 3175696, 112604, 764, 2620, 1221889, 98815588, 1384880065, 3337807996, 1384880065, 98815588, 1221889, 2620]

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

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