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A228476 Number of n X n binary arrays with top left value 1 and no two ones adjacent horizontally, vertically or antidiagonally. 6
1, 2, 14, 172, 4354, 211588, 20185842, 3737615288, 1349721589622, 948593164919044, 1298594593323021084, 3461591189556243601228, 17969903126848842785918376, 181660279488635404176787338286 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A228482
LINKS
EXAMPLE
Some solutions for n=4
..1..0..0..1....1..0..0..1....1..0..0..0....1..0..1..0....1..0..0..0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..1..0..1
..0..0..0..1....1..0..0..0....0..0..0..0....1..0..0..1....0..0..0..0
..1..0..0..0....0..0..0..1....0..0..0..1....0..1..0..0....0..1..0..1
CROSSREFS
Sequence in context: A351277 A235369 A351274 * A308449 A233224 A167014
KEYWORD
nonn
AUTHOR
R. H. Hardin Aug 22 2013
STATUS
approved

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Last modified March 19 06:32 EDT 2024. Contains 370953 sequences. (Running on oeis4.)