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 A279983 #4 Dec 24 2016 08:41:21 %S A279983 0,1205,43543,876704,15071233,237386464,3444870482,47830833513, %T A279983 640788381590,8346437314513,106354332622511,1330883900649974, %U A279983 16405039161663344,199652460980584803,2403337808498154619 %N A279983 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 two elements, and with new values introduced in order 0 sequentially upwards. %C A279983 Row 7 of A279977. %H A279983 R. H. Hardin, <a href="/A279983/b279983.txt">Table of n, a(n) for n = 1..48</a> %e A279983 Some solutions for n=3 %e A279983 ..0..1..0. .0..0..1. .0..1..0. .0..1..0. .0..1..0. .0..1..0. .0..1..0 %e A279983 ..0..1..1. .1..0..1. .1..0..1. .0..1..0. .1..0..0. .0..1..1. .1..0..1 %e A279983 ..0..0..1. .0..1..0. .1..0..0. .0..1..1. .1..0..1. .1..0..1. .0..1..0 %e A279983 ..0..1..0. .0..1..1. .0..1..1. .1..0..0. .1..1..1. .1..1..0. .1..1..0 %e A279983 ..1..1..0. .0..0..0. .0..1..1. .0..1..1. .1..0..1. .1..0..0. .1..0..1 %e A279983 ..0..0..1. .1..1..0. .0..1..1. .0..0..0. .0..1..0. .1..0..1. .0..0..1 %e A279983 ..1..1..0. .1..1..0. .0..0..1. .1..1..1. .1..0..1. .1..0..1. .0..1..0 %Y A279983 Cf. A279977. %K A279983 nonn %O A279983 1,2 %A A279983 _R. H. Hardin_, Dec 24 2016