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Number of n X n 0..2 arrays with antidiagonals unimodal and rows and diagonals nondecreasing
0

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

%S 3,31,476,7927,132119,2160036,34534687,540957770,8329684774,

%T 126518474741,1901584578700,28359907789963,420651674953990,

%U 6217185029060841,91703594406693983

%N Number of n X n 0..2 arrays with antidiagonals unimodal and rows and diagonals nondecreasing

%C Diagonal of A223999

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 30 2013