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 A222325 #6 Jul 23 2025 02:29:43 %S A222325 4,0,0,165,674,3770,15100,172590,759758,6657106,30994294,298933498, %T A222325 1368656291,12779873412,59202186592,560870492027,2605855916653, %U A222325 24609622243330,114661599066810,1086770275159481,5073242396321810 %N A222325 Number of nX5 0..1 arrays with exactly floor(nX5/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..1 order. %C A222325 Column 5 of A222328 %H A222325 R. H. Hardin, <a href="/A222325/b222325.txt">Table of n, a(n) for n = 1..110</a> %e A222325 Some solutions for n=4 %e A222325 ..0..1..1..1..1....0..0..1..1..1....0..0..0..1..0....0..0..0..0..0 %e A222325 ..1..1..1..1..0....0..0..1..1..1....0..0..0..1..1....0..0..0..0..1 %e A222325 ..1..1..1..1..1....1..1..1..1..1....0..0..0..1..1....0..0..0..0..1 %e A222325 ..1..1..1..1..1....0..1..1..1..1....0..0..0..1..1....0..0..0..1..0 %K A222325 nonn %O A222325 1,1 %A A222325 _R. H. Hardin_ Feb 15 2013