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.

A280066 Number of nX5 0..1 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.

Table of values

n a(n)
1 3
2 9
3 39
4 170
5 790
6 3729
7 17468
8 82769
9 394904
10 1890877
11 9080800
12 43650638
13 210047292
14 1011165147
15 4869719373
16 23456281889
17 113000007399
18 544411868911
19 2623011742357
20 12638188505237
21 60894518951302
22 293410920660702

List of values

[3, 9, 39, 170, 790, 3729, 17468, 82769, 394904, 1890877, 9080800, 43650638, 210047292, 1011165147, 4869719373, 23456281889, 113000007399, 544411868911, 2623011742357, 12638188505237, 60894518951302, 293410920660702]

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

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