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 A232280 #6 Jul 23 2025 07:14:40 %S A232280 292,174400,43029161,13094741315,3511626721526,933667586918234, %T A232280 256322282485691293,70060127952500800937,19022853021730043369306, %U A232280 5176615679021925091961553,1410282603443165709442188397 %N A232280 Number of nX7 0..2 arrays with no element less than a strict majority of its horizontal, diagonal and antidiagonal neighbors. %C A232280 Column 7 of A232281 %H A232280 R. H. Hardin, <a href="/A232280/b232280.txt">Table of n, a(n) for n = 1..41</a> %e A232280 Some solutions for n=2 %e A232280 ..2..2..0..0..0..1..0....0..2..2..0..0..2..2....0..0..2..0..0..2..2 %e A232280 ..1..0..0..0..2..0..2....1..0..0..0..1..2..2....2..0..0..0..0..1..2 %K A232280 nonn %O A232280 1,1 %A A232280 _R. H. Hardin_, Nov 22 2013