A222446 Sum of neighbor maps: number of nX3 binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their horizontal, vertical and antidiagonal neighbors in a random 0..3 nX3 array.

8, 64, 420, 4056, 32720, 262104, 2082688, 16777216, 134217728, 1073741824, 8588539008, 68719476736, 549755813888, 4398046511104, 35184256942080, 281474976587776, 2251799813537792, 18014398509359104, 144115179143299072

Offset: 1

Author

R. H. Hardin Feb 20 2013

Keywords

• nonn

Comments

Column 3 of A222448

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..188