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A184754
Half the number of n X n binary arrays with no 1 having an adjacent 1 both above and to its left
1
1, 7, 163, 12397, 3110914, 2568513843, 6982256142285, 62483420093901107, 1840782554883258104105, 178527915853668578288219231, 57000185549334885919706636039360, 59911857895558455825087768017439269698
OFFSET
1,2
COMMENTS
Diagonal of A184761
LINKS
EXAMPLE
Some solutions for 3X3
..1..1..0....1..1..1....1..1..0....1..0..1....1..0..1....0..0..1....0..1..1
..0..1..0....1..0..1....0..1..1....1..1..0....1..0..1....0..0..0....1..0..1
..0..1..0....1..1..0....1..0..0....0..0..0....1..0..0....1..1..0....0..0..0
CROSSREFS
Sequence in context: A212856 A351610 A169608 * A160241 A020998 A012504
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 21 2011
STATUS
approved