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.

A231940 T(n,k)=Number of nXk 0..3 arrays with no element less than a strict majority of its horizontal, diagonal and antidiagonal neighbors.

Table of values

n a(n)
1 4
2 4
3 16
4 16
5 84
6 64
7 50
8 668
9 318
10 256
11 144
12 5070
13 8426
14 1328
15 1024
16 422
17 42104
18 206808
19 152180
20 6064
21 4096
22 1268
23 326010
24 4736026
25 11159202
26 2462572
27 26918
28 16384
29 3823
30 2511252
31 94464137
32 691418144
33 518972238
34 36885538
35 116909
36 65536
37 11472

List of values

[4, 4, 16, 16, 84, 64, 50, 668, 318, 256, 144, 5070, 8426, 1328, 1024, 422, 42104, 206808, 152180, 6064, 4096, 1268, 326010, 4736026, 11159202, 2462572, 26918, 16384, 3823, 2511252, 94464137, 691418144, 518972238, 36885538, 116909, 65536, 11472]

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

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