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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
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OFFSET
1,1
COMMENTS
Column 7 of
A218288
LINKS
Table of n, a(n) for n=1..7.
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
Adjacent sequences:
A218284
A218285
A218286
*
A218288
A218289
A218290
KEYWORD
nonn
AUTHOR
R. H. Hardin
Oct 25 2012
STATUS
approved
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Last modified March 28 10:55 EDT 2024. Contains 371241 sequences. (Running on oeis4.)