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.

A279490 Number of nX4 0..1 arrays with no element equal to a strict majority of its horizontal, vertical 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 18
3 254
4 2684
5 26157
6 246237
7 2241332
8 19885341
9 172968364
10 1481176019
11 12518566165
12 104634697841
13 866300549164
14 7113499311107
15 57991161908834
16 469750378139503
17 3783568376847729
18 30319325084628268
19 241845032680119474

List of values

[3, 18, 254, 2684, 26157, 246237, 2241332, 19885341, 172968364, 1481176019, 12518566165, 104634697841, 866300549164, 7113499311107, 57991161908834, 469750378139503, 3783568376847729, 30319325084628268, 241845032680119474]