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 A232287 #6 Jul 23 2025 07:15:21 %S A232287 2187,13560,17764558,8229274953,2527067273698,706877889324298, %T A232287 256322282485691293,98517778421264329607,35243173677566129081248, %U A232287 12065580271163853464002869,4200286091740243261372580372 %N A232287 Number of 7Xn 0..2 arrays with no element less than a strict majority of its horizontal, diagonal and antidiagonal neighbors. %C A232287 Row 7 of A232281 %H A232287 R. H. Hardin, <a href="/A232287/b232287.txt">Table of n, a(n) for n = 1..12</a> %e A232287 Some solutions for n=2 %e A232287 ..0..0....2..1....0..0....2..0....2..1....0..1....2..2....2..1....0..0....0..2 %e A232287 ..1..2....0..0....2..0....0..1....1..2....1..0....2..2....1..1....0..0....0..0 %e A232287 ..2..1....0..0....0..0....1..0....1..1....0..1....1..1....1..2....2..2....2..0 %e A232287 ..1..1....0..0....0..0....0..0....0..0....0..0....0..0....0..0....2..2....0..2 %e A232287 ..0..0....0..0....2..0....0..1....0..0....0..0....0..0....0..0....2..2....0..0 %e A232287 ..0..0....2..0....0..2....2..0....2..0....0..1....2..0....0..1....2..2....0..0 %e A232287 ..0..0....0..2....0..0....0..2....0..0....2..0....0..2....2..0....0..0....0..2 %K A232287 nonn %O A232287 1,1 %A A232287 _R. H. Hardin_, Nov 22 2013