This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A167251 Number of ways to partition an n X 5 grid into 5 connected equal-area regions 1
 1, 8, 62, 454, 4006, 33344, 270827, 2152050, 15661597, 113764225, 757566033 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS EXAMPLE Some solutions for n=3 ...1.1.2.2.2...1.1.1.2.3...1.2.3.4.4...1.1.2.2.3...1.1.1.2.3...1.2.2.2.3 ...3.1.4.5.5...4.5.5.2.3...1.2.3.5.4...1.4.2.3.3...4.4.5.2.3...1.4.4.4.3 ...3.3.4.4.5...4.4.5.2.3...1.2.3.5.5...4.4.5.5.5...4.5.5.2.3...1.5.5.5.3 ------ ...1.1.2.2.2...1.1.1.2.2...1.1.2.2.3...1.2.2.3.3...1.1.2.3.3...1.2.3.3.4 ...1.3.4.4.4...3.4.4.5.2...4.1.2.3.3...1.1.2.3.4...4.1.2.3.5...1.2.3.5.4 ...3.3.5.5.5...3.3.4.5.5...4.4.5.5.5...5.5.5.4.4...4.4.2.5.5...1.2.5.5.4 ------ ...1.2.2.3.3...1.2.3.4.5...1.2.2.2.3...1.2.2.3.3...1.2.3.3.3...1.2.2.3.4 ...1.2.4.5.3...1.2.3.4.5...1.1.4.4.3...1.2.4.3.5...1.2.4.4.5...1.2.3.3.4 ...1.4.4.5.5...1.2.3.4.5...5.5.5.4.3...1.4.4.5.5...1.2.4.5.5...1.5.5.5.4 ------ ...1.1.2.3.3...1.1.2.2.2...1.1.2.3.4...1.1.2.2.3...1.1.2.2.2...1.1.2.3.3 ...1.2.2.4.3...1.3.4.5.5...1.5.2.3.4...4.1.2.5.3...3.1.4.4.4...1.4.2.2.3 ...5.5.5.4.4...3.3.4.4.5...5.5.2.3.4...4.4.5.5.3...3.3.5.5.5...4.4.5.5.5 CROSSREFS Sequence in context: A296584 A198690 A056054 * A227439 A144143 A284225 Adjacent sequences:  A167248 A167249 A167250 * A167252 A167253 A167254 KEYWORD nonn AUTHOR R. H. Hardin Oct 31 2009 STATUS approved

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

Last modified July 15 14:33 EDT 2019. Contains 325031 sequences. (Running on oeis4.)