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A185832
Half the number of nX6 binary arrays with every element equal to exactly one or two of its horizontal and vertical neighbors
1
5, 162, 1430, 11789, 98975, 923808, 7678409, 68363184, 593948668, 5187350050, 45205777641, 395015488029, 3443605978936, 30060887575003, 262260968830996, 2288567378102476, 19968587237909055, 174246131512755338
OFFSET
1,1
COMMENTS
Column 6 of A185835
LINKS
EXAMPLE
Some solutions for 4X6 with a(1,1)=0
..0..1..1..1..1..1....0..0..1..1..1..0....0..0..0..1..1..0....0..0..0..1..1..1
..0..0..0..0..0..1....0..1..0..0..1..0....0..1..1..1..0..0....0..1..1..0..0..0
..1..1..1..1..1..1....0..1..0..0..1..0....0..1..0..0..1..1....1..0..1..0..1..0
..0..0..0..0..0..0....0..0..1..1..0..0....0..1..1..0..0..1....1..0..1..0..1..0
CROSSREFS
Sequence in context: A322747 A274712 A117068 * A301667 A195950 A195951
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 05 2011
STATUS
approved