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A218815 Hilltop maps: number of 6Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..3 6Xn array 1
1, 3551, 245509, 16252713, 1039771513, 66531801953, 4257699787069, 272481107247773, 17438263706240211, 1116016197551446895, 71422966710588065133, 4570937163077667987697, 292531483564098288209289 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 6 of A218810

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..19

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

CROSSREFS

Sequence in context: A253657 A251040 A253727 * A248855 A151810 A083955

Adjacent sequences:  A218812 A218813 A218814 * A218816 A218817 A218818

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 06 2012

STATUS

approved

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Last modified May 21 17:51 EDT 2022. Contains 353921 sequences. (Running on oeis4.)