A221445 Hilltop maps: number of nX7 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 nX7 array.

57, 5785, 543081, 51186449, 4832005625, 456064257841, 43045366565233, 4062814670687601, 383466625153100089, 36193296042509422929, 3416085237442369485553, 322425410952503720400913

Offset: 1

Author

R. H. Hardin Jan 17 2013

Keywords

• nonn

Comments

Column 7 of A221446

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..50