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A204476 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly three ways, and new values 0..3 introduced in row major order 0

%I

%S 80,1326,608,1482,6494,18410,66580,265906,948920,3573030,13667010

%N Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly three ways, and new values 0..3 introduced in row major order

%C Diagonal of A204483

%e Some solutions for n=3

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 15 2012

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Last modified March 4 02:31 EST 2021. Contains 341773 sequences. (Running on oeis4.)