login
Number of nX4 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row or column
1

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

%S 214,45796,6758694,1066263778,166743944836,26097329476130,

%T 4082668526457918,638759164201438766,99937413499455220346,

%U 15635820994590324604534,2446316169346302177277972

%N Number of nX4 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row or column

%C Column 4 of A207535

%H R. H. Hardin, <a href="/A207531/b207531.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 18 2012