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Number of n X n 0..2 arrays avoiding 11 horizontally, 22 vertically and 00 antidiagonally
1

%I #6 Dec 18 2015 18:18:40

%S 3,38,1610,222990,104382552,162794962814,851668326534130,

%T 14897378230939391994,872764112558460116016396,

%U 171094770747292212524499798502,112292092887713869652391305250607824

%N Number of n X n 0..2 arrays avoiding 11 horizontally, 22 vertically and 00 antidiagonally

%C Diagonal of A229372

%H R. H. Hardin, <a href="/A229365/b229365.txt">Table of n, a(n) for n = 1..13</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Sep 21 2013