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.

A269214 T(n,k)=Number of nXk 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three exactly once.

Table of values

n a(n)
1 0
2 4
3 0
4 24
5 96
6 0
7 108
8 768
9 1152
10 0
11 432
12 6528
13 18048
14 11424
15 0
16 1620
17 49536
18 308544
19 361728
20 103488
21 0
22 5832
23 360960
24 4744704
25 12548544
26 6712704
27 889056
28 0
29 20412
30 2546304
31 70371048
32 394072704
33 474091776
34 118872576
35 7375872
36 0
37 69984
38 17563392

List of values

[0, 4, 0, 24, 96, 0, 108, 768, 1152, 0, 432, 6528, 18048, 11424, 0, 1620, 49536, 308544, 361728, 103488, 0, 5832, 360960, 4744704, 12548544, 6712704, 889056, 0, 20412, 2546304, 70371048, 394072704, 474091776, 118872576, 7375872, 0, 69984, 17563392]

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

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