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A183803 1/16 the number of (n+1)X(n+1) binary arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor 0

%I

%S 1,13,322,16953,1701473,360549804,148654946039,127200605449247,

%T 215287155239348168

%N 1/16 the number of (n+1)X(n+1) binary arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor

%C Diagonal of A183811

%e Some solutions with upper left block zero for 3X3

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 07 2011

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Last modified February 8 23:03 EST 2023. Contains 360153 sequences. (Running on oeis4.)