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A199355 Number of nX6 0..3 arrays with values 0..3 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

%S 45,9175,36379420,6518500460,32990481786550

%N Number of nX6 0..3 arrays with values 0..3 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 Column 6 of A199356

%e Some solutions for n=3

%e ..0..1..2..3..2..3....0..1..0..2..0..2....0..1..2..0..3..1....0..1..2..3..3..2

%e ..0..1..2..3..0..3....0..1..3..0..2..1....0..1..3..0..3..2....0..1..0..2..0..3

%e ..1..0..3..1..2..1....1..3..1..3..2..3....1..0..2..3..1..2....1..0..1..2..1..3

%K nonn

%O 1,1

%A _R. H. Hardin_ Nov 05 2011

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Last modified January 28 04:30 EST 2022. Contains 350654 sequences. (Running on oeis4.)