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

%I #5 Dec 18 2015 18:18:33

%S 4,100,6796,772683,120352359,23151623729,5173325036371,

%T 1291969529189675,351545826740833046,102423287609988684833,

%U 31560026488902316691503,10191808855482615567911934,3425597818181959478072701084

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

%C Diagonal of A224024

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 30 2013