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A222697 Number of n X n 0..1 arrays with no more than 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, 1, 9, 359, 11878, 2275891, 477839646, 530666212359, 644388515872465 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Diagonal of A222703
LINKS
EXAMPLE
Some solutions for n=3
..0..0..1....0..0..0....0..0..0....0..0..0....0..1..0....0..0..0....0..1..1
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..1....1..1..1
..0..0..0....0..0..0....0..0..1....0..1..0....0..0..0....0..0..0....1..1..1
CROSSREFS
Sequence in context: A012812 A266881 A119756 * A063068 A130558 A132593
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 28 2013
STATUS
approved

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Last modified June 14 11:59 EDT 2024. Contains 373397 sequences. (Running on oeis4.)