A221452 Hilltop maps: number of 7Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 7Xn array

1, 4063, 437437, 36364977, 3888200065, 414116287743, 43045366565233, 4487793927664209, 468786655087266657, 48944887790539796639, 5109638176609475597301, 533452901877309087321537

Offset

1,2

Comments

Row 7 of A221446

Links

R. H. Hardin, Table of n, a(n) for n = 1..45

Example

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

Crossrefs

Sequence in context: A118060 A146894 A013688 * A233985 A126822 A251005

Adjacent sequences: A221449 A221450 A221451 * A221453 A221454 A221455

Keyword

nonn

Author

R. H. Hardin Jan 17 2013

Status

approved