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A190534 Number of (n+2)X(n+2) symmetric binary matrices without the pattern 0 1 1 vertically, antidiagonally or horizontally 1
42, 282, 2156, 22640, 316238, 6107152, 160575506, 5870861789, 297355717075, 20939485177609, 2053441860491509, 280623087234506165, 53465534329788380473, 14206838360639441172569, 5266500605033810191697624 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
Some solutions for 4X4
..0..0..0..0....1..0..0..1....1..1..1..1....0..1..0..0....0..1..0..1
..0..1..0..1....0..0..0..1....1..1..1..0....1..0..0..0....1..0..0..0
..0..0..1..0....0..0..1..0....1..1..0..0....0..0..0..1....0..0..0..0
..0..1..0..1....1..1..0..0....1..0..0..1....0..0..1..0....1..0..0..1
CROSSREFS
Sequence in context: A309925 A188058 A036463 * A248466 A233407 A272139
KEYWORD
nonn
AUTHOR
R. H. Hardin May 12 2011
STATUS
approved

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Last modified April 14 18:28 EDT 2024. Contains 371667 sequences. (Running on oeis4.)