A219077 Hilltop maps: number of nX7 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..1 nX7 array.

57, 9367, 1023441, 113959413, 12998933707, 1473655240387, 167024618548071, 18939932662217929, 2147519964457580465, 243494396494378271955, 27608646901560676777421, 3130407281278669890215213

Offset: 1

Author

R. H. Hardin Nov 11 2012

Keywords

• nonn

Comments

Column 7 of A219078

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..119