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 A231943 #6 Jul 23 2025 06:44:36 %S A231943 256,1328,152180,11159202,691418144,35573826030,2011419734476, %T A231943 124582053082101,7653265481401592,452142751713371321, %U A231943 26462994900702111962,1569385399161912987654,93821782986385180580504 %N A231943 Number of 4Xn 0..3 arrays with no element less than a strict majority of its horizontal, diagonal and antidiagonal neighbors. %C A231943 Row 4 of A231940 %H A231943 R. H. Hardin, <a href="/A231943/b231943.txt">Table of n, a(n) for n = 1..210</a> %e A231943 Some solutions for n=2 %e A231943 ..3..0....3..1....1..3....0..0....0..0....0..0....2..0....1..1....0..0....0..0 %e A231943 ..0..0....1..3....0..0....0..0....0..3....0..1....0..2....2..2....0..0....0..0 %e A231943 ..0..0....2..1....0..0....1..1....2..0....2..0....3..0....3..3....1..1....0..3 %e A231943 ..0..3....1..2....3..2....3..3....0..0....0..1....0..2....3..3....1..3....1..0 %K A231943 nonn %O A231943 1,1 %A A231943 _R. H. Hardin_, Nov 15 2013