A218424 Hilltop maps: number of nX6 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..1 nX6 array.

31, 2849, 158429, 9539915, 572765605, 34328798853, 2058493362799, 123428176573409, 7400808508179025, 443756537313437079, 26607874601757021869, 1595422183998461122637, 95662355032495391763215

Offset: 1

Author

R. H. Hardin Oct 28 2012

Keywords

• nonn

Comments

Column 6 of A218426

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..44