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 A281764 #4 Jan 29 2017 12:39:46 %S A281764 15,698,7466,68362,589990,4845178,38998648,306847534,2376142873, %T A281764 18172170592,137541600309,1032205229342,7690612680576,56948407735784, %U A281764 419460675116112,3075312381551048,22455267348093278,163373533509709066 %N A281764 Number of nX7 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. %C A281764 Column 7 of A281765. %H A281764 R. H. Hardin, <a href="/A281764/b281764.txt">Table of n, a(n) for n = 1..210</a> %e A281764 Some solutions for n=4 %e A281764 ..0..0..0..0..0..1..1. .0..0..0..1..1..0..1. .0..1..1..0..0..1..1 %e A281764 ..0..0..0..0..1..1..1. .1..1..1..0..0..1..0. .1..1..1..1..0..0..1 %e A281764 ..0..0..0..0..1..1..1. .1..1..0..0..1..0..1. .1..1..1..0..0..1..1 %e A281764 ..0..0..0..1..1..0..0. .1..0..0..0..0..1..1. .1..1..1..0..0..1..1 %Y A281764 Cf. A281765. %K A281764 nonn %O A281764 1,1 %A A281764 _R. H. Hardin_, Jan 29 2017