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.

A279462 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 one element, and with new values introduced in order 0 sequentially upwards.

Table of values

n a(n)
1 2
2 20
3 180
4 1722
5 15484
6 129914
7 1079792
8 8845592
9 71540206
10 572555634
11 4544198480
12 35814522446
13 280584310722
14 2186897305592
15 16968580781888
16 131145107324352
17 1010053181919720
18 7755079215544062
19 59376833021426668

List of values

[2, 20, 180, 1722, 15484, 129914, 1079792, 8845592, 71540206, 572555634, 4544198480, 35814522446, 280584310722, 2186897305592, 16968580781888, 131145107324352, 1010053181919720, 7755079215544062, 59376833021426668]