A221445 Hilltop maps: number of nX7 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 nX7 array

57, 5785, 543081, 51186449, 4832005625, 456064257841, 43045366565233, 4062814670687601, 383466625153100089, 36193296042509422929, 3416085237442369485553, 322425410952503720400913

Offset

1,1

Comments

Column 7 of A221446

Links

R. H. Hardin, Table of n, a(n) for n = 1..50

Example

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

Crossrefs

Sequence in context: A012165 A209512 A132783 * A218353 A127455 A263669

Adjacent sequences: A221442 A221443 A221444 * A221446 A221447 A221448

Keyword

nonn

Author

R. H. Hardin Jan 17 2013

Status

approved