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A190537 Number of (n+2)X(n+2) symmetric binary matrices without the pattern 0 1 1 diagonally, vertically or horizontally 1
39, 276, 2462, 30347, 497319, 11215564, 345643238, 14729798587, 868126086355, 71051142699591, 8082717906091557, 1279982834102896086, 282345340720841681874, 86807291886729731363231 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
Some solutions for 4X4
..1..1..1..0....0..0..0..1....1..1..0..0....0..1..0..1....1..0..0..1
..1..0..1..0....0..1..0..1....1..1..1..0....1..1..1..1....0..0..0..1
..1..1..0..0....0..0..0..0....0..1..0..1....0..1..0..0....0..0..0..0
..0..0..0..0....1..1..0..0....0..0..1..0....1..1..0..0....1..1..0..0
CROSSREFS
Sequence in context: A229639 A070146 A327344 * A187095 A232874 A061169
KEYWORD
nonn
AUTHOR
R. H. Hardin May 12 2011
STATUS
approved

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Last modified April 22 09:25 EDT 2024. Contains 371894 sequences. (Running on oeis4.)