A218640 Hilltop maps: number of 5Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..3 5Xn array

1, 1001, 32689, 1048353, 33546641, 1073471633, 34351030657, 1099232741569, 35175445605065, 1125614194685977, 36019652123390673, 1152628800344096833, 36884119447102424865, 1180291753062182528225, 37769333882150509728449

Offset

1,2

Comments

Row 5 of A218638

Links

R. H. Hardin, Table of n, a(n) for n = 1..70

Example

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

Crossrefs

Sequence in context: A357774 A204965 A192776 * A221347 A109431 A267599

Adjacent sequences: A218637 A218638 A218639 * A218641 A218642 A218643

Keyword

nonn

Author

R. H. Hardin Nov 03 2012

Status

approved