A218205 Hilltop maps: number of nX7 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..2 nX7 array

97, 14719, 1945103, 246985085, 31459153095, 4010296932181, 511326127735795, 65195959047122215, 8312603150623482535, 1059871102752817956941, 135135389793386385932601, 17229996080059877345670629

Offset

1,1

Comments

Column 7 of A218206

Links

R. H. Hardin, Table of n, a(n) for n = 1..15

Example

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

Crossrefs

Sequence in context: A302330 A057011 A218591 * A218232 A219062 A218318

Adjacent sequences: A218202 A218203 A218204 * A218206 A218207 A218208

Keyword

nonn

Author

R. H. Hardin Oct 23 2012

Status

approved