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 A282884 #4 Feb 24 2017 07:49:40 %S A282884 26,1414,67676,2342046,80114311,2561487246,79687436788,2422749969094, %T A282884 72384911847530,2134206947210504,62249002221009867, %U A282884 1799694062835383562,51649085124007452943,1473029187027581364502,41785825649251975653356 %N A282884 Number of nX7 0..1 arrays with no 1 equal to more than one of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element. %C A282884 Column 7 of A282885. %H A282884 R. H. Hardin, <a href="/A282884/b282884.txt">Table of n, a(n) for n = 1..210</a> %e A282884 Some solutions for n=3 %e A282884 ..1..1..0..0..0..1..1. .0..1..1..0..0..0..1. .1..0..1..0..0..0..0 %e A282884 ..0..0..0..1..0..0..0. .0..0..1..0..0..1..0. .0..0..1..0..0..0..0 %e A282884 ..0..0..0..0..1..1..1. .1..0..0..0..0..0..1. .0..0..0..0..1..1..1 %Y A282884 Cf. A282885. %K A282884 nonn %O A282884 1,1 %A A282884 _R. H. Hardin_, Feb 24 2017