A189900 - OEIS

%I #5 Mar 31 2012 12:36:16

%S 15,225,3375,35656,377517,3810503,36890502,354894796,3368920072,

%T 31765314572,298643477857,2799075682549,26196661596588,

%U 244952250115880,2288817676141909,21378736239048787,199638668209430098

%N Number of nX4 binary arrays without the pattern 0 0 1 1 diagonally, vertically, antidiagonally or horizontally

%C Column 4 of A189905

%H R. H. Hardin, <a href="/A189900/b189900.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for 5X4

%e ..0..0..0..0....0..1..0..0....0..0..0..1....0..0..0..1....0..1..0..0

%e ..0..0..0..0....1..0..1..1....1..1..1..1....0..0..0..0....1..1..1..0

%e ..0..0..0..0....0..1..0..0....1..1..0..1....0..0..0..1....0..1..1..0

%e ..1..1..0..0....0..1..0..1....1..1..0..1....0..0..0..1....0..0..1..0

%e ..0..0..0..0....1..1..0..1....0..1..0..1....1..1..0..1....1..0..1..0

%K nonn

%O 1,1

%A _R. H. Hardin_ May 01 2011