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 A279493 #4 Dec 13 2016 12:21:28 %S A279493 15,801,46095,2241332,98128162,4065077852,162346342126,6294925767121, %T A279493 238434528280477,8863487201716422,324449796535829989, %U A279493 11723580027925010371,418958469982919690628,14829876008361939503733 %N A279493 Number of nX7 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. %C A279493 Column 7 of A279494. %H A279493 R. H. Hardin, <a href="/A279493/b279493.txt">Table of n, a(n) for n = 1..58</a> %e A279493 Some solutions for n=3 %e A279493 ..0..1..1..0..0..0..0. .0..1..0..1..1..1..0. .0..0..0..0..1..0..1 %e A279493 ..1..0..0..1..1..0..0. .0..1..1..0..1..0..0. .1..1..1..1..0..0..1 %e A279493 ..0..1..1..0..1..1..1. .1..0..1..1..0..1..1. .0..0..1..0..0..1..0 %Y A279493 Cf. A279494. %K A279493 nonn %O A279493 1,1 %A A279493 _R. H. Hardin_, Dec 13 2016