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%I #9 Oct 11 2023 15:55:44
%S 16,64,144,376,856,1984,4480,9856,22144,47104,105472,219136,489472,
%T 999424,2228224,4489216,9994240,19922944,44302336,87556096,194510848,
%U 381681664,847249408,1652555776,3665821696
%N Number of (n+1) X (n+1) 0..1 arrays with the number of rightwards and downwards edge increases in each 2 X 2 subblock differing from the number in all its horizontal and vertical neighbors.
%e Some solutions for n=4:
%e ..0..1..0..0..0....1..0..1..0..0....0..1..0..1..1....0..1..0..1..1
%e ..0..0..1..0..0....1..1..1..1..1....1..1..1..0..1....0..0..0..0..0
%e ..0..0..0..1..0....1..0..1..0..1....0..1..1..1..0....0..1..0..1..0
%e ..1..0..0..0..0....1..1..1..1..1....1..0..1..1..1....0..0..0..0..0
%e ..0..1..0..0..1....0..0..1..0..1....1..1..0..1..0....0..1..0..1..0
%Y Diagonal of A205072.
%K nonn,more
%O 1,1
%A _R. H. Hardin_, Jan 21 2012
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