A219083 Hilltop maps: number of 6Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..1 6Xn array

1, 2007, 137251, 6879341, 407374825, 24734141495, 1473655240387, 87658679181837, 5224891480887673, 311448275014507959, 18561000349587530731, 1106162872162349349293, 65924427026919551179361

Offset

1,2

Comments

Row 6 of A219078

Links

R. H. Hardin, Table of n, a(n) for n = 1..23

Example

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

Crossrefs

Sequence in context: A295701 A250922 A201343 * A258553 A258560 A281987

Adjacent sequences: A219080 A219081 A219082 * A219084 A219085 A219086

Keyword

nonn

Author

R. H. Hardin Nov 11 2012

Status

approved