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Number of (n+2)X(n+2) 0..2 arrays with no increasing sequence of length 3 horizontally or diagonally downwards
1

%I #5 Dec 14 2013 06:51:31

%S 17064,27826929,345855899520,32842430056859347,

%T 23811740158656753556614,131875420683502307856971387719,

%U 5579329268797957710001574591451050376,1803344684216195708245651510240850004883561345

%N Number of (n+2)X(n+2) 0..2 arrays with no increasing sequence of length 3 horizontally or diagonally downwards

%C Diagonal of A233618

%H R. H. Hardin, <a href="/A233610/b233610.txt">Table of n, a(n) for n = 1..11</a>

%e Some solutions for n=1

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 14 2013