%I #6 Dec 18 2015 18:18:01

%S 2,16,114,1521,55361,3892729,474552171,116947584576,59951676534906,

%T 60921409199181129,121441530119384020545,483128923550195512221129,

%U 3857404253001354057074186601,61418617253685924322130029824769

%N Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 0 vertically

%C Diagonal of A207426

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 17 2012