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A205265 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, and new values 0..1 introduced in row major order 0

%I #5 Mar 31 2012 12:37:05

%S 223,21537,7191926,8174802163,32079295935853,433101439309430572,

%T 20100570131126768440800

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

%C Diagonal of A205273

%e Some solutions for n=3

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 24 2012

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Last modified April 24 04:02 EDT 2024. Contains 371918 sequences. (Running on oeis4.)