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 A231699 #6 Jul 23 2025 06:38:04 %S A231699 1268,691229,711067486,696904625544,556835183317668, %T A231699 458723384178436491,394600405782342943410,337091385019548510376164, %U A231699 285400541198740304070351399,242059566770098900152264298823 %N A231699 Number of nX7 0..3 arrays with no element less than a strict majority of its horizontal, vertical and antidiagonal neighbors. %C A231699 Column 7 of A231700 %H A231699 R. H. Hardin, <a href="/A231699/b231699.txt">Table of n, a(n) for n = 1..13</a> %e A231699 Some solutions for n=2 %e A231699 ..0..0..2..0..0..1..1....0..0..0..0..0..0..0....0..0..0..0..0..1..1.. %e A231699 ..0..2..3..0..2..3..1....0..3..0..1..2..1..0....0..3..1..0..3..2..1.. %K A231699 nonn %O A231699 1,1 %A A231699 _R. H. Hardin_, Nov 12 2013