A219306 Unchanging value maps: number of nX4 binary arrays indicating the locations of corresponding elements unequal to no horizontal or vertical neighbor in a random 0..2 nX4 array.

7, 51, 423, 3334, 25647, 200376, 1574278, 12334824, 96480571, 755212375, 5914093280, 46306103745, 362524633360, 2838264260603, 22221912955624, 173982894127917, 1362160216940837, 10664747935404835, 83497581682654109

Offset: 1

Author

R. H. Hardin Nov 17 2012

Keywords

• nonn

Comments

Column 4 of A219310

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..48