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.
%I A279462 #4 Dec 12 2016 15:17:30 %S A279462 2,20,180,1722,15484,129914,1079792,8845592,71540206,572555634, %T A279462 4544198480,35814522446,280584310722,2186897305592,16968580781888, %U A279462 131145107324352,1010053181919720,7755079215544062,59376833021426668 %N 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. %C A279462 Column 4 of A279466. %H A279462 R. H. Hardin, <a href="/A279462/b279462.txt">Table of n, a(n) for n = 1..210</a> %e A279462 Some solutions for n=4 %e A279462 ..0..1..0..0. .0..1..0..0. .0..0..1..0. .0..1..0..1. .0..0..1..0 %e A279462 ..0..1..1..0. .1..0..1..0. .1..0..1..0. .1..1..0..1. .1..1..1..1 %e A279462 ..1..0..1..1. .1..1..1..0. .1..0..1..0. .1..0..0..0. .0..0..0..0 %e A279462 ..0..1..0..1. .0..0..1..0. .1..1..0..1. .0..1..1..0. .0..1..1..1 %Y A279462 Cf. A279466. %K A279462 nonn %O A279462 1,1 %A A279462 _R. H. Hardin_, Dec 12 2016