A167256 - OEIS

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A167256

Number of ways to partition an n X 8 grid into 2 connected equal-area regions

1, 8, 355, 10164, 277969

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

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for n=3

...1.1.1.1.2.2.2.2...1.1.1.1.1.1.1.1...1.1.1.1.1.1.1.1...1.1.1.1.1.1.1.1

...1.2.2.2.2.1.2.2...2.1.1.2.2.1.1.2...1.2.2.2.1.2.2.1...2.2.1.2.2.2.1.1

...1.1.1.1.1.1.2.2...2.2.2.2.2.2.2.2...1.2.2.2.2.2.2.2...2.2.2.2.2.2.2.1

------

...1.1.2.2.2.2.2.2...1.1.1.1.1.2.2.2...1.1.1.2.2.2.2.2...1.1.1.1.1.1.1.2

...1.1.1.1.1.1.2.2...1.1.1.1.2.2.2.2...1.1.1.2.2.2.2.2...1.2.2.1.1.2.1.2

...1.1.1.1.2.2.2.2...1.1.1.2.2.2.2.2...1.1.1.1.1.1.2.2...1.2.2.2.2.2.2.2

------

...1.1.1.1.1.1.1.2...1.1.1.1.1.1.1.2...1.2.2.2.2.2.2.2...1.1.1.1.1.1.1.1

...1.2.2.1.2.2.1.2...2.1.1.1.1.2.1.2...1.2.2.1.1.2.1.2...1.2.2.1.2.1.2.1

...1.1.2.2.2.2.2.2...2.2.2.2.2.2.2.2...1.1.1.1.1.1.1.2...2.2.2.2.2.2.2.2

------

...1.1.1.1.1.1.1.2...1.1.1.1.1.1.2.2...1.1.1.1.1.1.1.1...1.1.2.2.2.2.2.2

...1.1.2.1.1.2.1.2...1.2.2.1.1.1.2.2...1.2.2.2.2.2.1.1...1.2.2.1.2.2.2.2

...2.2.2.2.2.2.2.2...1.1.2.2.2.2.2.2...2.2.2.2.2.2.2.1...1.1.1.1.1.1.1.1

CROSSREFS

Sequence in context: A221163 A000436 A015507 * A277656 A264198 A193837

Adjacent sequences: A167253 A167254 A167255 * A167257 A167258 A167259

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 31 2009

STATUS

approved