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A163694 Number of nXn binary arrays with all 1s connected, a path of 1s from top row to lower right corner, and no 1 having more than two 1s adjacent 0
1, 5, 28, 259, 3643, 76848, 2583720 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

EXAMPLE

All solutions for n=3

...0.0.1...0.0.1...0.1.1...0.1.1...1.1.1...1.1.1...1.1.1...1.1.1...0.0.1

...0.0.1...0.0.1...0.0.1...0.0.1...0.0.1...0.0.1...1.0.1...1.0.1...0.0.1

...0.0.1...0.1.1...0.0.1...0.1.1...0.0.1...0.1.1...0.0.1...0.1.1...1.1.1

------

...0.1.1...1.1.1...1.1.1...1.1.1...0.1.0...0.1.1...1.1.0...0.1.0...1.1.0

...0.0.1...0.0.1...1.0.1...1.0.1...0.1.0...0.1.0...0.1.0...0.1.1...0.1.1

...1.1.1...1.1.1...1.1.1...1.0.1...0.1.1...0.1.1...0.1.1...0.0.1...0.0.1

------

...1.0.0...1.0.0...1.0.0...1.0.0...1.1.0...1.1.0...1.1.1...0.0.1...0.1.1

...1.1.0...1.1.1...1.0.0...1.0.1...1.0.0...1.0.1...1.0.0...1.0.1...1.0.1

...0.1.1...0.0.1...1.1.1...1.1.1...1.1.1...1.1.1...1.1.1...1.1.1...1.1.1

------

...1.0.1

...1.0.1

...1.1.1

CROSSREFS

Sequence in context: A000530 A121674 A116977 * A062796 A023887 A171187

Adjacent sequences:  A163691 A163692 A163693 * A163695 A163696 A163697

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Aug 03 2009

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Last modified February 17 16:00 EST 2012. Contains 206050 sequences.