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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 Table of n, a(n) for n=1..9. 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 Adjacent sequences: A222694 A222695 A222696 * A222698 A222699 A222700 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.)