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 A279747 #4 Dec 18 2016 07:49:36 %S A279747 0,708,14827,209558,2672708,33954530,413326300,4935790522,58121852669, %T A279747 675518172098,7773001073377,88696281069640,1004930528193136, %U A279747 11316984133423012,126774873608784154,1413596066478838994 %N A279747 Number of 7Xn 0..1 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. %C A279747 Row 7 of A279741. %H A279747 R. H. Hardin, <a href="/A279747/b279747.txt">Table of n, a(n) for n = 1..72</a> %e A279747 Some solutions for n=3 %e A279747 ..0..1..0. .0..1..0. .0..1..0. .0..1..0. .0..1..0. .0..1..0. .0..1..0 %e A279747 ..0..1..0. .0..0..1. .1..0..1. .1..0..1. .1..0..1. .0..1..1. .0..0..1 %e A279747 ..0..0..1. .1..0..1. .1..1..0. .0..1..0. .1..0..1. .1..0..1. .1..1..0 %e A279747 ..1..1..0. .1..1..0. .0..1..1. .0..0..1. .0..1..1. .1..0..1. .0..1..0 %e A279747 ..1..0..0. .0..1..0. .0..1..0. .1..0..1. .1..0..0. .1..0..0. .1..1..0 %e A279747 ..1..1..0. .0..1..0. .0..0..1. .1..1..0. .0..1..1. .1..0..1. .1..0..1 %e A279747 ..1..0..1. .1..1..0. .1..0..1. .0..1..1. .1..0..1. .1..0..1. .1..0..1 %Y A279747 Cf. A279741. %K A279747 nonn %O A279747 1,2 %A A279747 _R. H. Hardin_, Dec 18 2016