%I #3 Feb 18 2013 05:38:22

%S 16,232,3968,63488,1048576,16776896,268369920,4294961152,68702608704,

%T 1099511627776,17592160878592,281474976700416,4503599627370496

%N Sum of neighbor maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to the sum mod 3 of their horizontal and antidiagonal neighbors in a random 0..2 4Xn array

%C Row 4 of A222386

%e Some solutions for n=3

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 18 2013