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 A232374 #6 Jul 23 2025 07:22:14 %S A232374 26,4682,259458,14326374,825606450,47301712998,2706080691402, %T A232374 154987416800398,8875595994390694,508249649361525870, %U A232374 29105003808620979142,1666700158869294743494,95443569491003523718078 %N A232374 Number of nX6 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 A232374 Column 6 of A232376 %H A232374 R. H. Hardin, <a href="/A232374/b232374.txt">Table of n, a(n) for n = 1..210</a> %e A232374 Some solutions for n=2 %e A232374 ..1..2..1..0..3..2....3..2..3..2..3..0....2..3..2..1..2..1....3..2..3..0..2..1 %e A232374 ..1..0..3..2..1..0....3..2..3..2..1..0....2..1..2..3..2..1....3..2..1..0..2..3 %K A232374 nonn %O A232374 1,1 %A A232374 _R. H. Hardin_, Nov 23 2013