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A228659
Number of nX7 binary arrays with top left value 1 and no two ones adjacent horizontally, diagonally or antidiagonally.
1
13, 194, 3556, 62368, 1096624, 19236832, 337258048, 5910459096, 103561279328, 1814380139952, 31785935283840, 556837728488064, 9754730426036000, 170882696555044928, 2993497165464775680, 52439495408779417216
OFFSET
1,1
COMMENTS
Column 7 of A228660
LINKS
FORMULA
Empirical: a(n) = 30*a(n-1) -226*a(n-2) -108*a(n-3) +4324*a(n-4) -1612*a(n-5) -27016*a(n-6) -2240*a(n-7) +50112*a(n-8) +20032*a(n-9) -16768*a(n-10) -4864*a(n-11) +2048*a(n-12)
EXAMPLE
Some solutions for n=4
..1..0..0..0..0..0..1....1..0..0..0..0..0..1....1..0..0..0..0..1..0
..0..0..0..0..0..0..1....0..0..1..0..1..0..0....0..0..0..0..0..0..0
..0..0..1..0..1..0..1....1..0..1..0..1..0..1....1..0..0..0..0..0..0
..0..0..1..0..0..0..1....0..0..1..0..0..0..1....1..0..1..0..0..1..0
CROSSREFS
Sequence in context: A213698 A159196 A177508 * A221581 A015690 A027773
KEYWORD
nonn
AUTHOR
R. H. Hardin Aug 29 2013
STATUS
approved