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A205019 Number of (n+1)X(n+1) 0..3 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards 0

%I

%S 256,27611,7148335,11646996582,69845358912381,2391551925319245318,

%T 235682549037000868908322,159301222429065945412750692320

%N Number of (n+1)X(n+1) 0..3 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards

%C Diagonal of A205027

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 21 2012

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Last modified January 24 13:48 EST 2022. Contains 350538 sequences. (Running on oeis4.)