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 A183376 #7 Jul 22 2025 08:53:22 %S A183376 2,9,28,68,143,364,952,2509,6412,16544,42939,111540,291108,757309, %T A183376 1972172,5144362,13414809,34987626,91292436,238197883,621533082, %U A183376 1622128746,4233391807,11048462916,28837147416,75265508987,196446917068 %N A183376 Number of nX3 binary arrays with no element equal to the mod 3 sum of its king-move neighbors. %C A183376 Column 3 of A183380 %H A183376 R. H. Hardin, <a href="/A183376/b183376.txt">Table of n, a(n) for n = 1..200</a> %e A183376 Some solutions for 5X3 %e A183376 ..0..1..0....1..1..0....1..1..1....0..1..1....0..1..0....0..1..1....0..1..0 %e A183376 ..1..0..1....1..0..1....1..1..1....0..1..1....1..0..1....1..0..1....1..0..1 %e A183376 ..1..0..1....0..1..0....1..1..1....0..0..0....1..0..1....0..1..0....1..0..1 %e A183376 ..1..1..1....0..0..0....1..1..1....0..0..0....1..1..1....1..1..1....0..1..0 %e A183376 ..1..0..1....0..1..0....1..1..1....1..0..1....1..0..0....1..0..1....0..0..0 %K A183376 nonn %O A183376 1,1 %A A183376 _R. H. Hardin_ Jan 04 2011