A219084 Hilltop maps: number of 7Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..1 7Xn array

1, 7361, 1019123, 99118753, 11660290321, 1410242020653, 167024618548071, 19746897662050241, 2339794277074504521, 277259160805907947953, 32846897167510082525531, 3891392293661362699294561

Offset

1,2

Comments

Row 7 of A219078

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Example

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

Crossrefs

Sequence in context: A204507 A295002 A235951 * A284925 A128478 A257498

Adjacent sequences: A219081 A219082 A219083 * A219085 A219086 A219087

Keyword

nonn

Author

R. H. Hardin Nov 11 2012

Status

approved