A163726 - OEIS

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A163726

Number of nX5 binary arrays with all 1s connected, a path of 1s from left column to right column, and no 1 having more than two 1s adjacent

1, 26, 236, 1611, 9012, 42833, 184346, 750199, 2938865, 11140954

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

All solutions for n=2

...1.1.1.1.1...1.1.1.1.1...1.1.1.1.1...1.1.1.1.1...0.0.0.0.0...0.0.0.0.1

...0.0.0.0.0...0.0.0.0.1...1.0.0.0.0...1.0.0.0.1...1.1.1.1.1...1.1.1.1.1

------

...1.0.0.0.0...1.0.0.0.1...1.1.0.0.0...1.1.0.0.1...1.1.1.0.0...1.1.1.0.1

...1.1.1.1.1...1.1.1.1.1...0.1.1.1.1...0.1.1.1.1...0.0.1.1.1...0.0.1.1.1

------

...1.1.1.0.0...1.1.1.0.1...1.1.1.1.0...1.1.1.1.0...0.0.0.1.1...1.0.0.1.1

...1.0.1.1.1...1.0.1.1.1...0.0.0.1.1...1.0.0.1.1...1.1.1.1.0...1.1.1.1.0

------

...0.0.1.1.1...0.0.1.1.1...1.0.1.1.1...1.0.1.1.1...0.1.1.1.1...0.1.1.1.1

...1.1.1.0.0...1.1.1.0.1...1.1.1.0.0...1.1.1.0.1...1.1.0.0.0...1.1.0.0.1

------

...1.1.0.1.1...0.1.1.1.0

...0.1.1.1.0...1.1.0.1.1

CROSSREFS

Sequence in context: A172124 A196633 A196638 * A293614 A245873 A275880

Adjacent sequences: A163723 A163724 A163725 * A163727 A163728 A163729

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 03 2009

STATUS

approved