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A204484 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly one way, and new values 0..1 introduced in row major order 0

%I

%S 72,511,2547,11137,43620,169432,658793,2543298,9877925,38441749,

%T 149816511,585601752,2290712744,8967902015,35126111858

%N Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly one way, and new values 0..1 introduced in row major order

%C Diagonal of A204492

%e Some solutions for n=3

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 15 2012

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Last modified January 21 03:58 EST 2022. Contains 350473 sequences. (Running on oeis4.)