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 A218058 #7 Jul 22 2025 23:47:14 %S A218058 2,6,74,1664,99934,14096488,4803404048,3998208473098,7963043911683306, %T A218058 38560364205334572480,449439593711854068531514, %U A218058 12671283745052415612872263552,862325227959961803770298778601380 %N A218058 Number of n X n arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random 0..1 n X n array. %C A218058 Diagonal of A218064 %e A218058 Some solutions for n=3 %e A218058 ..0..0..1....1..1..0....0..0..1....0..0..0....0..0..1....1..1..1....1..0..0 %e A218058 ..0..0..0....0..0..0....1..1..1....0..0..1....0..0..1....1..1..0....0..0..0 %e A218058 ..0..0..0....0..0..1....1..1..1....0..0..0....0..0..1....0..0..0....0..0..1 %K A218058 nonn %O A218058 1,1 %A A218058 _R. H. Hardin_ Oct 19 2012