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 A233244 #6 Jul 23 2025 07:58:26 %S A233244 1248,2565169,8259321811,26484848685044,85091928322674062, %T A233244 273407904115337411320,878515500504975619593232, %U A233244 2822866314474146429532816501,9070511857884868729790040866912 %N A233244 Number of 6Xn 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, diagonally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order. %C A233244 Row 6 of A233239 %H A233244 R. H. Hardin, <a href="/A233244/b233244.txt">Table of n, a(n) for n = 1..210</a> %e A233244 Some solutions for n=2 %e A233244 ..0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0 %e A233244 ..0..1....0..1....0..1....0..0....0..1....0..0....0..1....0..0....0..0....0..1 %e A233244 ..0..2....0..1....2..2....0..1....2..2....1..2....2..0....1..2....1..2....1..2 %e A233244 ..0..3....2..1....4..0....2..1....5..1....4..2....0..4....4..3....4..5....4..5 %e A233244 ..1..3....5..1....2..5....5..4....1..2....2..4....0..4....4..5....4..0....2..2 %e A233244 ..4..0....3..3....5..4....0..1....5..2....5..1....4..0....1..2....4..4....4..4 %K A233244 nonn %O A233244 1,1 %A A233244 _R. H. Hardin_, Dec 06 2013