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.

A265458 T(n,k)=Number of nXk 0..n+k-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.

Table of values

n a(n)
1 1
2 2
3 2
4 12
5 18
6 12
7 66
8 250
9 250
10 66
11 360
12 3358
13 7422
14 3358
15 360
16 1864
17 42282
18 216466
19 216466
20 42282
21 1864
22 9358
23 502154
24 6056182
25 13943772
26 6056182
27 502154
28 9358
29 45642
30 5710302
31 161435322
32 871209026
33 871209026
34 161435322
35 5710302
36 45642

List of values

[1, 2, 2, 12, 18, 12, 66, 250, 250, 66, 360, 3358, 7422, 3358, 360, 1864, 42282, 216466, 216466, 42282, 1864, 9358, 502154, 6056182, 13943772, 6056182, 502154, 9358, 45642, 5710302, 161435322, 871209026, 871209026, 161435322, 5710302, 45642]

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

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