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 A203915 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..1 introduced in row major order 0

%I

%S 112,1682,21470,262088,3191760,38438912,457030140,5384729088,

%T 62912016986,730166033682,8416701868906,96505946204192,

%U 1100473855059936,12494678609945088,141221958080796180,1590433321339235592

%N Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..1 introduced in row major order

%C Diagonal of A203923

%e Some solutions for n=3

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 07 2012

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Last modified May 22 04:38 EDT 2022. Contains 353933 sequences. (Running on oeis4.)