A205162 - OEIS

%I #5 Mar 31 2012 12:37:05

%S 13,8479,100138314,16713430246949,39233079877190973984,

%T 1295254361100907855849613402,601414054429072205807810003186176794

%N Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having unequal diagonal elements or unequal antidiagonal elements, and new values 0..3 introduced in row major order

%C Diagonal of A205170

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 22 2012