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A163706
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Number of nX4 binary arrays with all 1s connected, a path of 1s from left column to lower right corner, and no 1 having more than two 1s adjacent
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0
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1, 11, 63, 259, 896, 2821, 8515, 24940, 70944, 196626, 534162, 1430008, 3786133, 9937397, 25902833, 67151065, 173338487, 445930356, 1144130515, 2929289696, 7487194973
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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EXAMPLE
| All solutions for n=2
...0.0.0.0...0.0.0.1...1.0.0.0...1.0.0.1...1.1.0.0...1.1.0.1...1.1.1.0
...1.1.1.1...1.1.1.1...1.1.1.1...1.1.1.1...0.1.1.1...0.1.1.1...0.0.1.1
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...1.1.1.0...1.1.1.1...1.1.1.1...0.1.1.1
...1.0.1.1...0.0.0.1...1.0.0.1...1.1.0.1
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CROSSREFS
| Sequence in context: A162946 A120723 A053367 * A180763 A184055 A161459
Adjacent sequences: A163703 A163704 A163705 * A163707 A163708 A163709
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KEYWORD
| nonn
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net) Aug 03 2009
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