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.

A281798 Number of nX4 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

Table of values

n a(n)
1 3
2 38
3 372
4 1916
5 8354
6 32524
7 117401
8 404594
9 1345667
10 4351562
11 13766102
12 42771530
13 130923764
14 395755820
15 1183519011
16 3506644006
17 10305848743
18 30072612682
19 87197043981
20 251401262840
21 721134389016
22 2059017606124

List of values

[3, 38, 372, 1916, 8354, 32524, 117401, 404594, 1345667, 4351562, 13766102, 42771530, 130923764, 395755820, 1183519011, 3506644006, 10305848743, 30072612682, 87197043981, 251401262840, 721134389016, 2059017606124]