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 A231843 #6 Jul 23 2025 06:43:49 %S A231843 1024,34350,2836554,241961326,24188209253,2346558875473, %T A231843 220309043506362,20436353978575810,1898683544490465967, %U A231843 176985535233028614945,16519157344329121693878,1541791797676344309156140 %N A231843 Number of 5Xn 0..3 arrays with no element less than a strict majority of its horizontal and antidiagonal neighbors. %C A231843 Row 5 of A231839 %H A231843 R. H. Hardin, <a href="/A231843/b231843.txt">Table of n, a(n) for n = 1..210</a> %e A231843 Some solutions for n=2 %e A231843 ..1..1....1..1....2..1....0..0....3..3....2..2....0..0....3..3....0..0....3..0 %e A231843 ..2..3....2..3....0..0....1..0....3..1....0..0....3..2....1..1....1..0....0..3 %e A231843 ..1..1....3..2....2..1....0..3....1..2....2..2....2..0....1..2....0..0....2..0 %e A231843 ..3..2....0..0....0..0....3..3....2..2....1..0....0..0....3..0....0..1....0..2 %e A231843 ..2..2....1..1....0..3....0..0....2..2....0..2....1..1....0..0....1..1....2..2 %K A231843 nonn %O A231843 1,1 %A A231843 _R. H. Hardin_, Nov 14 2013