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.

A269276 T(n,k)=Number of nXk 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.

Table of values

n a(n)
1 0
2 4
3 0
4 24
5 108
6 0
7 108
8 1368
9 1620
10 0
11 432
12 13896
13 46872
14 20412
15 0
16 1620
17 127512
18 1104264
19 1365336
20 236196
21 0
22 5832
23 1104264
24 23549400
25 74853576
26 36673560
27 2598156
28 0
29 20412
30 9211608
31 474819408
32 3719884392
33 4684312584
34 938176344

List of values

[0, 4, 0, 24, 108, 0, 108, 1368, 1620, 0, 432, 13896, 46872, 20412, 0, 1620, 127512, 1104264, 1365336, 236196, 0, 5832, 1104264, 23549400, 74853576, 36673560, 2598156, 0, 20412, 9211608, 474819408, 3719884392, 4684312584, 938176344]

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

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