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 A183377 #7 Jul 22 2025 08:53:30 %S A183377 3,20,68,225,627,2152,7036,22392,74381,241819,793240,2604908,8530131, %T A183377 28013101,91893580,301557767,989945590,3248890744,10664829792, %U A183377 35007809686,114914687393,377229380984,1238309771635,4064987753276 %N A183377 Number of nX4 binary arrays with no element equal to the mod 3 sum of its king-move neighbors. %C A183377 Column 4 of A183380 %H A183377 R. H. Hardin, <a href="/A183377/b183377.txt">Table of n, a(n) for n = 1..200</a> %e A183377 Some solutions for 5X4 %e A183377 ..1..1..1..0....1..0..0..0....0..1..0..0....1..0..1..1....0..1..1..0 %e A183377 ..0..1..0..1....1..1..1..0....1..0..1..0....1..1..1..0....0..1..1..0 %e A183377 ..0..1..1..1....0..0..0..1....1..0..0..1....0..1..1..0....1..1..1..1 %e A183377 ..0..0..1..0....1..1..0..1....0..1..0..1....0..1..1..1....1..0..1..0 %e A183377 ..0..1..1..0....1..0..1..1....0..0..1..1....1..1..0..0....0..1..1..0 %K A183377 nonn %O A183377 1,1 %A A183377 _R. H. Hardin_ Jan 04 2011