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.

A269201 T(n,k)=Number of nXk 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once.

Table of values

n a(n)
1 4
2 16
3 16
4 60
5 180
6 64
7 216
8 1284
9 1740
10 256
11 756
12 9612
13 25572
14 15540
15 1024
16 2592
17 68052
18 400428
19 471492
20 132300
21 4096
22 8748
23 472044
24 5877228
25 15289548
26 8314020
27 1090740
28 16384
29 29160
30 3212820
31 84310620
32 463790340
33 555862380
34 142233732

List of values

[4, 16, 16, 60, 180, 64, 216, 1284, 1740, 256, 756, 9612, 25572, 15540, 1024, 2592, 68052, 400428, 471492, 132300, 4096, 8748, 472044, 5877228, 15289548, 8314020, 1090740, 16384, 29160, 3212820, 84310620, 463790340, 555862380, 142233732]

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

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