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Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having the same number of equal diagonal or antidiagonal elements, and new values 0..2 introduced in row major order
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%I #5 Mar 31 2012 12:37:06

%S 14,275,12866,1329947,323378690,194089073306,288041668868162,

%T 1037162852168747729

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

%C Diagonal of A205361

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 26 2012