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A218204

Hilltop maps: number of nX6 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..2 nX6 array.

49, 3697, 243953, 15491481, 986715373, 62898202889, 4010296932181, 255691410570153, 16302319940388693, 1039399046535129357, 66269738827040491989, 4225209395073151758765, 269389846510288006570825

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 6 of A218206

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..54

EXAMPLE

Some solutions for n=3

..0..0..1..0..1..0....0..1..0..1..1..1....0..0..0..0..0..1....0..0..1..0..0..0

..0..1..0..1..0..1....1..1..0..1..1..0....0..1..1..1..1..1....1..0..0..1..0..0

..1..0..1..1..1..0....0..0..0..0..1..1....1..0..1..0..0..0....1..0..0..0..1..1