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A204373 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 three ways, and new values 0..1 introduced in row major order 0

%I

%S 33,48,61,87,136,217,347,560,901,1455,2352,3801,6147,9944,16085,26023,

%T 42104,68121,110219,178336,288549,466879,755424,1222297,1977715

%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 three ways, and new values 0..1 introduced in row major order

%C Diagonal of A204381

%e Some solutions for n=3

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 14 2012

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Last modified October 19 11:35 EDT 2021. Contains 348088 sequences. (Running on oeis4.)