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A207093
Number of 7Xn 0..1 arrays avoiding 0 0 0 horizontally and 0 0 1 vertically
1
54, 2916, 88465, 3500117, 134515416, 4992838052, 189659424011, 7170730063393, 270475089293918, 10224494565608260, 386259141164549753, 14590174277869464225, 551225314435579230372, 20824003807957963946688
OFFSET
1,1
COMMENTS
Row 7 of A207088
LINKS
EXAMPLE
Some solutions for n=4
..0..1..1..0....1..0..0..1....0..1..1..1....0..0..1..0....0..0..1..1
..1..1..0..1....0..1..1..0....1..0..0..1....0..1..1..1....0..0..1..1
..1..0..0..1....1..0..1..1....0..1..0..0....0..0..1..0....0..0..1..1
..1..1..0..0....1..1..1..1....0..1..0..0....0..1..0..0....0..0..1..0
..0..1..0..1....1..1..0..1....0..1..0..0....0..1..1..0....0..0..1..0
..1..0..0..1....0..0..1..0....0..1..0..0....0..0..1..0....0..0..1..0
..1..1..0..1....0..1..1..1....0..1..0..0....0..1..0..0....0..0..1..0
CROSSREFS
Sequence in context: A189700 A206893 A188761 * A188990 A189200 A042405
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 15 2012
STATUS
approved