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 A214100 #6 Jul 22 2025 23:07:05 %S A214100 43,1179,37441,1241355,41634729,1400634371,47155766193,1587939072699, %T A214100 53475662148217,1800879393466291,60647750806896129, %U A214100 2042420662520443627,68782159093181338185,2316362060724569945187,78007631120858457824081 %N A214100 Number of 0..2 colorings on an nX8 array circular in the 8 direction with new values 0..2 introduced in row major order. %C A214100 Column 7 of A214101 %H A214100 R. H. Hardin, <a href="/A214100/b214100.txt">Table of n, a(n) for n = 1..210</a> %F A214100 Empirical: a(n) = 54*a(n-1) -820*a(n-2) +4906*a(n-3) -11803*a(n-4) +11888*a(n-5) -4672*a(n-6) +576*a(n-7) %e A214100 Some solutions for n=4 %e A214100 ..0..1..2..0..1..0..1..2....0..1..2..0..1..2..1..2....0..1..2..1..0..1..2..1 %e A214100 ..2..0..1..2..0..1..0..1....2..0..1..2..0..1..2..1....1..0..1..0..1..2..0..2 %e A214100 ..0..1..2..0..1..0..1..2....0..1..2..0..1..0..1..2....0..1..2..1..2..1..2..1 %e A214100 ..2..0..1..2..0..1..2..0....1..2..1..2..0..1..2..0....2..0..1..2..0..2..1..0 %K A214100 nonn %O A214100 1,1 %A A214100 _R. H. Hardin_ Jul 04 2012