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A218287 Hilltop maps: number of nX7 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..4 nX7 array 0
121, 16289, 2095233, 268366049, 34355128651, 4397469258389, 562876144341077 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 7 of A218288
LINKS
EXAMPLE
Some solutions for n=3
..0..0..0..0..0..0..1....0..0..1..0..0..0..1....0..0..1..0..0..0..0
..0..1..0..0..1..0..1....0..1..1..0..1..1..1....0..0..0..0..1..0..1
..0..0..1..0..1..1..1....0..0..0..0..0..1..1....0..1..1..1..0..1..0
CROSSREFS
Sequence in context: A050740 A121013 A287728 * A129450 A232279 A202887
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 25 2012
STATUS
approved

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Last modified June 18 02:05 EDT 2024. Contains 373468 sequences. (Running on oeis4.)