login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A167246 Number of ways to partition a 3*n X 3 grid into 9 connected equal-area regions 0

%I #3 Mar 31 2012 12:35:36

%S 1,41,3127,44855,1082911,29384641,331247456

%N Number of ways to partition a 3*n X 3 grid into 9 connected equal-area regions

%e Some solutions for n=3

%e ...1.2.2...1.2.2...1.2.3...1.1.2...1.1.2...1.1.1...1.1.1...1.1.2...1.1.2

%e ...1.3.2...1.1.2...1.2.3...3.1.2...1.2.2...2.2.2...2.2.2...1.3.2...1.3.2

%e ...1.3.3...3.3.4...1.2.3...3.4.2...3.4.5...3.3.3...3.3.4...3.3.2...3.3.2

%e ...4.5.6...3.4.4...4.4.4...3.4.4...3.4.5...4.5.5...3.4.4...4.4.5...4.4.4

%e ...4.5.6...5.5.5...5.6.6...5.5.5...3.4.5...4.4.5...5.6.6...4.5.5...5.5.5

%e ...4.5.6...6.6.6...5.7.6...6.7.7...6.6.6...6.7.7...5.6.7...6.7.7...6.6.6

%e ...7.8.8...7.8.8...5.7.7...6.6.7...7.7.8...6.7.8...5.7.7...6.8.7...7.8.8

%e ...7.8.9...7.8.9...8.8.8...8.9.9...7.8.8...6.9.8...8.8.8...6.8.8...7.9.8

%e ...7.9.9...7.9.9...9.9.9...8.8.9...9.9.9...9.9.8...9.9.9...9.9.9...7.9.9

%K nonn

%O 1,2

%A _R. H. Hardin_ Oct 31 2009

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 9 05:33 EDT 2024. Contains 375759 sequences. (Running on oeis4.)