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A167253 Number of ways to partition an n X 6 grid into 3 connected equal-area regions 0
1, 9, 132, 1787, 22889, 264500 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=4

...1.1.1.1.1.2...1.1.1.1.1.1...1.1.1.1.2.2...1.1.1.2.2.2...1.1.2.2.2.2

...1.1.3.2.2.2...2.2.2.2.3.1...1.1.1.2.2.2...1.3.3.2.2.2...1.2.2.2.3.2

...3.1.3.2.2.2...2.2.2.2.3.1...3.3.1.2.2.2...1.1.3.3.2.2...1.3.3.3.3.3

...3.3.3.3.3.2...3.3.3.3.3.3...3.3.3.3.3.3...1.1.3.3.3.3...1.1.1.1.3.3

------

...1.1.1.1.2.3...1.1.1.2.3.3...1.2.2.2.2.2...1.1.2.3.3.3...1.1.1.1.1.1

...1.2.1.2.2.3...1.2.2.2.3.3...1.2.1.2.3.2...1.1.2.2.3.3...2.2.2.2.1.1

...1.2.2.2.3.3...1.2.2.2.3.3...1.1.1.1.3.3...1.1.2.2.2.3...2.3.3.3.3.3

...1.2.3.3.3.3...1.1.1.2.3.3...1.3.3.3.3.3...1.1.2.2.3.3...2.2.2.3.3.3

------

...1.1.1.1.1.1...1.1.2.2.2.2...1.2.2.2.3.3...1.1.1.1.1.1...1.1.1.1.1.1

...1.2.2.2.3.1...1.3.3.3.3.2...1.1.1.2.3.3...2.1.2.1.3.3...2.2.2.2.2.1

...2.2.3.2.3.3...1.3.1.3.3.2...1.2.2.2.2.3...2.2.2.2.2.3...2.2.3.3.3.1

...2.2.3.3.3.3...1.1.1.3.2.2...1.1.1.3.3.3...2.3.3.3.3.3...2.3.3.3.3.3

CROSSREFS

Sequence in context: A112123 A282820 A296318 * A097999 A089547 A110273

Adjacent sequences:  A167250 A167251 A167252 * A167254 A167255 A167256

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 31 2009

STATUS

approved

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Last modified June 25 12:55 EDT 2019. Contains 324352 sequences. (Running on oeis4.)