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A228979
Number of n X n 0..1 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1)X(n+1) 0..1 array.
0
2, 16, 512, 56472, 20729216, 25205141664, 102496979446048, 1399175578116323192, 64226272780209688718776
OFFSET
1,1
COMMENTS
Diagonal of A228986.
EXAMPLE
Some solutions for n=4
..0..0..1..0....0..0..1..1....1..1..0..1....1..1..1..0....0..0..0..1
..1..0..1..0....1..1..0..0....0..0..0..1....1..1..0..1....0..0..0..1
..1..1..0..0....1..0..1..0....1..1..0..0....0..1..0..0....1..0..1..0
..1..1..1..0....1..0..1..1....1..1..1..1....0..1..0..1....0..0..1..0
CROSSREFS
Sequence in context: A267728 A063387 A326251 * A366514 A293150 A286039
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 10 2013
STATUS
approved