A218597 Hilltop maps: number of 6Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..2 6Xn array

1, 2849, 224643, 14309253, 906390787, 57707873919, 3679019688741, 234587060833513, 14956980852954693, 953622639363956241, 60800788454758533673, 3876520842651206103055, 247158250520323924145773

Offset

1,2

Comments

Row 6 of A218592

Links

R. H. Hardin, Table of n, a(n) for n = 1..74

Example

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

Crossrefs

Sequence in context: A257148 A254737 A234416 * A259296 A020429 A255026

Adjacent sequences: A218594 A218595 A218596 * A218598 A218599 A218600

Keyword

nonn

Author

R. H. Hardin Nov 03 2012

Status

approved