A221071 Sum of neighbor maps: number of nX7 binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their king-move neighbors in a random 0..3 nX7 array.

128, 1364, 2097152, 268435456, 25241048576, 4398046511104, 562949953421312, 70342550622109696

Offset: 1

Author

R. H. Hardin Dec 31 2012

Keywords

• nonn

Comments

Column 7 of A221072

Examples

			Some solutions for n=3
..0..0..0..0..1..1..1....0..0..1..0..0..1..1....0..0..0..0..1..1..1
..0..0..1..0..0..0..0....0..0..1..0..0..1..0....0..0..0..0..1..0..0
..0..0..0..0..0..0..0....0..1..1..1..0..0..1....0..1..0..0..0..1..0