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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 R. H. Hardin, Table of n, a(n) for n = 1..30 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 Adjacent sequences: A190531 A190532 A190533 * A190535 A190536 A190537 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.)