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A222282
Number of n X n 0..1 arrays with exactly floor(n X n/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order
0
1, 0, 4, 208, 6582, 1249354, 262048125, 288902941734, 350421368609396
OFFSET
1,3
COMMENTS
Diagonal of A222290
EXAMPLE
Some solutions for n=4
..0..0..0..1....0..0..0..0....0..0..1..1....0..0..0..1....0..0..0..0
..0..0..1..1....0..0..0..0....0..1..1..1....0..0..0..1....0..0..1..0
..0..0..1..1....0..0..1..0....0..0..1..1....0..0..1..1....0..0..0..1
..0..1..1..1....0..1..1..0....0..0..1..1....0..0..1..1....0..0..0..1
CROSSREFS
Sequence in context: A129465 A300152 A260639 * A087924 A201978 A081787
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 14 2013
STATUS
approved