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.

A202889 T(n,k)=Number of nXk 0..2 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.

Table of values

n a(n)
1 1
2 3
3 3
4 9
5 35
6 9
7 22
8 265
9 265
10 22
11 51
12 1849
13 5493
14 1849
15 51
16 121
17 13345
18 109119
19 109119
20 13345
21 121
22 292
23 96941
24 2223723
25 6092872
26 2223723
27 96941
28 292
29 704
30 701275
31 45332961
32 348151747
33 348151747
34 45332961
35 701275
36 704
37 1691
38 5071167
39 922352267

List of values

[1, 3, 3, 9, 35, 9, 22, 265, 265, 22, 51, 1849, 5493, 1849, 51, 121, 13345, 109119, 109119, 13345, 121, 292, 96941, 2223723, 6092872, 2223723, 96941, 292, 704, 701275, 45332961, 348151747, 348151747, 45332961, 701275, 704, 1691, 5071167, 922352267]

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

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