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 A218524 #8 Jul 22 2025 23:58:07 %S A218524 64,236,4634,46140,639228,7687526,100029148,1260284690,16119079970, %T A218524 204833380744,2611281890222,33242567872546,423477139656892, %U A218524 5393125440584082,68692255949507890,874885927192766714 %N A218524 Number of 3Xn arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random 0..3 3Xn array. %C A218524 Row 3 of A218522 %H A218524 R. H. Hardin, <a href="/A218524/b218524.txt">Table of n, a(n) for n = 1..159</a> %e A218524 Some solutions for n=3 %e A218524 ..3..1..0....0..0..0....1..1..1....0..0..3....2..2..3....0..0..0....1..1..3 %e A218524 ..0..0..0....0..0..2....3..1..3....0..0..1....3..2..3....2..0..2....2..1..1 %e A218524 ..0..2..3....2..0..0....2..0..0....0..0..3....2..1..1....2..2..2....1..1..3 %K A218524 nonn %O A218524 1,1 %A A218524 _R. H. Hardin_ Oct 31 2012