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 A189899 Number of n X n binary arrays without the pattern 0 0 1 1 diagonally, vertically, antidiagonally or horizontally 0
 2, 16, 512, 35656, 6442436, 2719427244, 2662054379066, 6207537762978575 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A189905 LINKS EXAMPLE Some solutions for 4X4 ..1..0..1..1....1..1..0..1....1..0..0..1....1..0..0..1....0..0..0..0 ..1..0..0..0....1..0..1..0....1..1..1..1....1..1..1..1....0..1..1..0 ..1..0..0..0....1..0..0..0....0..0..1..0....1..1..0..0....0..0..1..0 ..1..1..1..1....1..0..1..1....1..0..1..1....0..1..0..0....0..0..1..0 CROSSREFS Sequence in context: A012389 A009710 A012393 * A189335 A189773 A189152 Adjacent sequences: A189896 A189897 A189898 * A189900 A189901 A189902 KEYWORD nonn AUTHOR R. H. Hardin May 01 2011 STATUS approved

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Last modified April 1 19:13 EDT 2023. Contains 361695 sequences. (Running on oeis4.)