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 A232382 #6 Jul 23 2025 07:23:04 %S A232382 1,15354,2324142,213082596,22946925502,2706080691402,319646954776850, %T A232382 37494469061522404,4414758747409076838,520602557203321831906, %U A232382 61403145242482284875036,7242121207883084184401892 %N A232382 Number of 7Xn 0..3 arrays with every 0 next to a 1, every 1 next to a 2 and every 2 next to a 3 horizontally, diagonally or antidiagonally, and no adjacent values equal. %C A232382 Row 7 of A232376 %H A232382 R. H. Hardin, <a href="/A232382/b232382.txt">Table of n, a(n) for n = 1..39</a> %e A232382 Some solutions for n=2 %e A232382 ..2..1....2..3....3..2....1..3....2..3....0..3....2..3....2..3....1..0....2..1 %e A232382 ..0..3....2..3....3..0....0..2....0..1....2..1....0..1....0..3....1..2....0..3 %e A232382 ..0..2....0..1....1..2....3..1....2..3....3..0....2..3....2..1....3..2....1..3 %e A232382 ..3..1....3..2....1..2....2..0....0..1....1..2....0..1....3..0....1..0....0..2 %e A232382 ..2..1....3..2....3..0....1..3....2..3....1..3....3..2....1..2....1..3....3..1 %e A232382 ..0..3....1..0....2..1....1..2....0..1....2..3....1..2....3..2....1..2....2..1 %e A232382 ..2..1....3..2....2..3....3..0....3..2....2..1....3..0....1..0....3..2....2..3 %K A232382 nonn %O A232382 1,2 %A A232382 _R. H. Hardin_, Nov 23 2013