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A199222 Number of n X n 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or one horizontal or vertical neighbors 0

%I #6 Dec 18 2015 18:17:54

%S 1,6,110,55956,49412210,70698654245

%N Number of n X n 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or one horizontal or vertical neighbors

%C Diagonal of A199230

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Nov 04 2011

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Last modified February 27 04:33 EST 2024. Contains 370362 sequences. (Running on oeis4.)