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.

A281721 Number of 7Xn 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 64
2 22
3 30
4 1625
5 10738
6 142023
7 1721319
8 18779855
9 230037168
10 2667856089
11 31098469537
12 368912116468
13 4299998362349
14 50615320723942
15 594638970383925
16 6971797426746210
17 81973100282054094
18 962121842116973906

List of values

[64, 22, 30, 1625, 10738, 142023, 1721319, 18779855, 230037168, 2667856089, 31098469537, 368912116468, 4299998362349, 50615320723942, 594638970383925, 6971797426746210, 81973100282054094, 962121842116973906]

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

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