%I #5 Mar 31 2012 12:36:58
%S 112,10576,3784288,5426653360,31960919852416,783865714144759744,
%T 80711089384087351043680
%N Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements
%C Diagonal of A203796
%e Some solutions for n=4
%e ..3..2..2..1..1....1..1..3..3..0....1..0..2..0..1....1..0..0..0..0
%e ..3..3..2..2..1....3..1..1..3..3....2..1..0..0..0....3..1..0..1..0
%e ..3..3..3..2..2....1..1..1..1..3....1..3..1..0..0....1..3..1..3..1
%e ..2..3..1..3..2....2..1..3..1..1....2..1..1..1..0....1..1..3..0..3
%e ..0..2..3..1..3....2..2..1..2..1....1..1..2..1..1....0..1..1..3..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 05 2012