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 A214140 #6 Jul 22 2025 23:10:12 %S A214140 568,6800539,84746307320,1056293079317795,13166014293744404256, %T A214140 164106209736507364778963,2045482716827052535560126536, %U A214140 25495681657765974468503864709699,317787963043598693812170748728654192 %N A214140 Number of 0..4 colorings on an nX8 array circular in the 8 direction with new values 0..4 introduced in row major order. %C A214140 Column 7 of A214141 %H A214140 R. H. Hardin, <a href="/A214140/b214140.txt">Table of n, a(n) for n = 1..26</a> %e A214140 Some solutions for n=4 %e A214140 ..0..1..2..0..3..0..1..3....0..1..0..1..0..1..0..2....0..1..0..2..3..4..0..3 %e A214140 ..4..0..1..4..0..2..4..0....3..2..3..4..2..0..2..0....2..3..4..3..4..3..4..0 %e A214140 ..0..3..4..0..4..0..1..2....4..0..4..2..4..1..0..1....0..2..0..1..0..4..1..2 %e A214140 ..3..0..1..4..0..2..3..0....3..4..0..1..0..2..4..2....2..3..4..0..2..0..2..4 %K A214140 nonn %O A214140 1,1 %A A214140 _R. H. Hardin_ Jul 05 2012