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A218816 Hilltop maps: number of 7Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..3 7Xn array 0
1, 14089, 1962145, 260019585, 33269071149, 4257533926265, 544920898689805, 69746876778780705, 8927330185180639569, 1142664774863616467437, 146256847938932844410005 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 7 of A218810

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=3

..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0

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

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

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

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

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

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

CROSSREFS

Sequence in context: A229699 A181963 A140708 * A254191 A254184 A253796

Adjacent sequences:  A218813 A218814 A218815 * A218817 A218818 A218819

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 06 2012

STATUS

approved

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Last modified August 5 05:22 EDT 2020. Contains 336209 sequences. (Running on oeis4.)