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.

A278309 T(n,k)=Number of nXk 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.

Table of values

n a(n)
1 0
2 3
3 3
4 16
5 32
6 16
7 51
8 294
9 294
10 51
11 126
12 2089
13 4558
14 2089
15 126
16 266
17 11486
18 70795
19 70795
20 11486
21 266
22 504
23 51562
24 986014
25 2360544
26 986014
27 51562
28 504
29 882
30 197981
31 11557658
32 79562696
33 79562696
34 11557658
35 197981
36 882
37 1452
38 672365
39 114457714

List of values

[0, 3, 3, 16, 32, 16, 51, 294, 294, 51, 126, 2089, 4558, 2089, 126, 266, 11486, 70795, 70795, 11486, 266, 504, 51562, 986014, 2360544, 986014, 51562, 504, 882, 197981, 11557658, 79562696, 79562696, 11557658, 197981, 882, 1452, 672365, 114457714]

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

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