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A206644 Number of n X n 0..2 arrays with no occurrence of three equal elements in a row horizontally or vertically, and new values 0..2 introduced in row major order. 0

%I

%S 1,14,1625,1414023,7241587334,235596375117548,47431914936748228227

%N Number of n X n 0..2 arrays with no occurrence of three equal elements in a row horizontally or vertically, and new values 0..2 introduced in row major order.

%e Some solutions for n=4

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

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

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

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

%Y Diagonal of A206650.

%K nonn

%O 1,2

%A _R. H. Hardin_, Feb 11 2012

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Last modified September 26 20:34 EDT 2021. Contains 347672 sequences. (Running on oeis4.)