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.

A281719 Number of 5Xn 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.

Table of values

n a(n)
1 16
2 9
3 17
4 245
5 937
6 6417
7 37781
8 214045
9 1321909
10 7709401
11 45858679
12 274481652
13 1621718293
14 9681714758
15 57586120717
16 342417879408
17 2040527424639
18 12140992057625
19 72295270999213
20 430542760825365
21 2563358199717255

List of values

[16, 9, 17, 245, 937, 6417, 37781, 214045, 1321909, 7709401, 45858679, 274481652, 1621718293, 9681714758, 57586120717, 342417879408, 2040527424639, 12140992057625, 72295270999213, 430542760825365, 2563358199717255]

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

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