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 A231217 #6 Jul 23 2025 06:18:37 %S A231217 44,413,7844,139438,2534951,45593903,820418528,14743946094, %T A231217 265057746273,4764850607558,85665969646863,1540161104743915, %U A231217 27690540964980741,497845771876658529,8950739306626864235,160924591529710020492 %N A231217 Number of (n+1)X(6+1) 0..2 arrays with no element unequal to a strict majority of its horizontal and vertical neighbors, with values 0..2 introduced in row major order. %C A231217 Column 6 of A231219 %H A231217 R. H. Hardin, <a href="/A231217/b231217.txt">Table of n, a(n) for n = 1..85</a> %e A231217 Some solutions for n=4 %e A231217 ..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..1 %e A231217 ..1..1..0..0..1..1..1....0..0..0..1..1..2..2....0..0..2..2..0..0..1 %e A231217 ..1..1..1..1..1..1..1....2..2..0..1..1..2..2....0..0..2..2..0..1..1 %e A231217 ..1..1..1..1..1..1..1....2..2..0..2..2..2..2....1..1..1..0..0..1..1 %e A231217 ..0..0..0..0..0..0..0....0..0..0..2..2..2..2....1..1..1..0..0..1..1 %K A231217 nonn %O A231217 1,1 %A A231217 _R. H. Hardin_, Nov 05 2013