A218371 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..3 nX7 array

113, 16129, 2088955, 267910753, 34291593409, 4389308736641, 561830980890331, 71914331590859185, 9205030297410405091, 1178243348932339905711

Offset

1,1

Comments

Column 7 of A218372

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A187632 A218809 A218195 * A218637 A218241 A152496

Adjacent sequences: A218368 A218369 A218370 * A218372 A218373 A218374

Keyword

nonn

Author

R. H. Hardin Oct 27 2012

Status

approved