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.

A268904 T(n,k)=Number of nXk 0..2 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once.

Table of values

n a(n)
1 0
2 3
3 0
4 12
5 36
6 0
7 36
8 168
9 240
10 0
11 96
12 696
13 1584
14 1344
15 0
16 240
17 2664
18 9720
19 12960
20 6912
21 0
22 576
23 9720
24 54936
25 118584
26 98496
27 33792
28 0
29 1344
30 34344
31 299088
32 1004184
33 1347192
34 715392
35 159744
36 0
37 3072
38 118584
39 1585800
40 8250912
41 17194680
42 14644152
43 5038848

List of values

[0, 3, 0, 12, 36, 0, 36, 168, 240, 0, 96, 696, 1584, 1344, 0, 240, 2664, 9720, 12960, 6912, 0, 576, 9720, 54936, 118584, 98496, 33792, 0, 1344, 34344, 299088, 1004184, 1347192, 715392, 159744, 0, 3072, 118584, 1585800, 8250912, 17194680, 14644152, 5038848]

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

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