A207578 - OEIS

%I #5 Mar 31 2012 12:37:18

%S 232,53824,10346480,1970169608,374571613718,71203824562653,

%T 13535979641561061,2573229281243934565,489173996571459881745,

%U 92992485278748462877948,17677953484864963770195712

%N Number of nX4 0..3 arrays avoiding the pattern z+1 z+1 z horizontally and z-1 z-1 z vertically

%C Column 4 of A207582

%H R. H. Hardin, <a href="/A207578/b207578.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

%e ..1..0..2..1....0..1..0..3....3..1..1..1....1..3..0..1....1..0..2..3

%e ..0..1..0..2....2..2..2..2....3..3..3..1....0..0..1..0....2..1..1..1

%e ..2..1..0..3....1..1..3..2....3..1..3..3....0..1..1..3....3..3..0..1

%e ..1..0..2..0....0..3..3..0....3..1..1..1....3..0..3..1....0..0..3..3

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 19 2012