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 A280159 #4 Dec 27 2016 09:22:02 %S A280159 8,92,950,7628,58852,434790,3138340,22348406,157294986,1097158250, %T A280159 7598014364,52296147282,358119530526,2441393217986,16579221466148, %U A280159 112199621622362,756987753165838,5093205986747148,34183505883347834 %N A280159 Number of nX6 0..1 arrays with no element unequal 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 A280159 Column 6 of A280161. %H A280159 R. H. Hardin, <a href="/A280159/b280159.txt">Table of n, a(n) for n = 1..210</a> %e A280159 Some solutions for n=4 %e A280159 ..0..0..0..1..0..0. .0..0..0..0..0..0. .0..0..1..0..1..1. .0..0..0..0..0..1 %e A280159 ..0..0..1..1..0..0. .0..0..1..1..1..0. .0..1..1..1..1..0. .1..1..1..0..1..1 %e A280159 ..0..1..1..0..1..1. .0..1..1..1..1..0. .1..1..1..0..0..0. .1..1..1..0..1..1 %e A280159 ..1..1..0..0..1..1. .0..1..1..1..0..0. .1..1..0..0..0..0. .0..1..0..0..0..0 %Y A280159 Cf. A280161. %K A280159 nonn %O A280159 1,1 %A A280159 _R. H. Hardin_, Dec 27 2016