A219138 Unchanging value maps: number of nX4 binary arrays indicating the locations of corresponding elements unequal to no horizontal, diagonal or antidiagonal neighbor in a random 0..2 nX4 array.

7, 39, 281, 1774, 11385, 73136, 472638, 3050285, 19667721, 126807809, 817795362, 5274346426, 34015377046, 219367395594, 1414720693245, 9123720789554, 58840106012423, 379467286876826, 2447231592206585, 15782503349398343

Offset: 1

Author

R. H. Hardin Nov 12 2012

Keywords

• nonn

Comments

Column 4 of A219142

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..31