A221065 - OEIS

%I #5 Dec 18 2015 18:18:24

%S 2,8,512,65536,17530176,68719476736,562949953421312

%N Sum of neighbor maps: number of n X n binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their king-move neighbors in a random 0..3 n X n array

%C Diagonal of A221072

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 31 2012