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 A217967 #8 Jul 22 2025 23:45:05 %S A217967 81,343,7765,93765,1483419,21409033,325878175,4873250877,73450141827, %T A217967 1104008971493,16615223109133,249949206695547,3760847564430971, %U A217967 56583449950921439,851347218771176575,12809113773490102743 %N A217967 Number of 4Xn arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random 0..2 4Xn array. %C A217967 Row 4 of A217964 %H A217967 R. H. Hardin, <a href="/A217967/b217967.txt">Table of n, a(n) for n = 1..21</a> %e A217967 Some solutions for n=3 %e A217967 ..1..1..1....2..2..2....0..0..2....0..0..0....2..1..1....2..0..0....0..0..0 %e A217967 ..2..0..0....2..2..2....2..0..2....2..0..2....2..0..0....0..0..2....1..0..0 %e A217967 ..1..0..0....2..0..0....0..0..1....2..1..1....2..0..0....1..0..1....2..0..0 %e A217967 ..2..0..1....0..0..1....1..1..2....1..1..2....1..0..2....0..0..0....0..0..1 %K A217967 nonn %O A217967 1,1 %A A217967 _R. H. Hardin_ Oct 16 2012