A218232 Hilltop maps: number of nX7 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..2 nX7 array

97, 15327, 2029849, 258892017, 33110750073, 4236306950287, 542011629493301, 69347116728197085, 8872536875936240705, 1135186578412743140189, 145240149217754781511971, 18582584875909724340490255

Offset

1,1

Comments

Column 7 of A218233

Links

R. H. Hardin, Table of n, a(n) for n = 1..31

Example

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

Crossrefs

Sequence in context: A057011 A218591 A218205 * A219062 A218318 A233426

Adjacent sequences: A218229 A218230 A218231 * A218233 A218234 A218235

Keyword

nonn

Author

R. H. Hardin Oct 24 2012

Status

approved