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A218595 Hilltop maps: number of 4Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..2 4Xn array 1
1, 191, 3567, 56629, 898763, 14313773, 228191491, 3638365943, 58007785937, 924827168901, 14744666323421, 235076662350533, 3747866807725781, 59752871465350263, 952650082055322631, 15188260508053833233 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 4 of A218592

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..162

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A061331 A177683 A209549 * A296580 A206860 A206954

Adjacent sequences:  A218592 A218593 A218594 * A218596 A218597 A218598

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 03 2012

STATUS

approved

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Last modified December 6 01:25 EST 2021. Contains 349558 sequences. (Running on oeis4.)