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Number of n X n 0..3 arrays with rows and antidiagonals unimodal and columns nondecreasing
0

%I #5 Dec 18 2015 18:18:32

%S 4,100,4884,315124,23738426,1989679315,181330154458,17720685250743,

%T 1838270364212150,200766237618388230,22925992371163981667,

%U 2721355255765297425689

%N Number of n X n 0..3 arrays with rows and antidiagonals unimodal and columns nondecreasing

%C Diagonal of A223864

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 28 2013