cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A167249 Number of ways to partition a 3*n X 4 grid into 6 connected equal-area regions.

Original entry on oeis.org

11, 2003, 244252, 22351172, 1403637121
Offset: 1

Views

Author

R. H. Hardin Oct 31 2009

Keywords

Examples

			Some solutions for n=3
...1.1.1.2...1.1.1.2...1.1.1.2...1.1.1.2...1.1.1.2...1.1.1.2...1.1.1.2
...1.1.2.2...1.1.2.2...1.1.2.2...1.1.2.2...1.1.2.2...1.1.2.2...1.1.2.2
...1.3.2.2...1.3.2.2...1.3.2.2...1.3.2.2...1.3.2.2...1.3.2.2...1.3.2.2
...4.3.3.2...3.3.3.2...3.3.3.2...3.3.3.2...3.3.3.2...3.3.3.2...3.3.3.2
...4.3.3.5...4.3.3.5...4.3.5.5...3.3.4.4...3.3.4.4...4.3.3.5...3.3.4.4
...4.6.3.5...4.6.6.5...4.3.5.5...4.4.4.4...5.4.4.4...4.6.5.5...5.5.5.4
...4.6.5.5...4.4.6.5...4.6.6.5...5.6.6.6...5.6.6.4...4.6.6.5...5.6.6.4
...4.6.5.5...4.6.6.5...4.6.6.5...5.6.6.6...5.6.6.6...4.6.6.5...5.6.4.4
...4.6.6.6...4.6.5.5...4.4.6.6...5.5.5.5...5.5.5.6...4.4.6.5...5.6.6.6
		

Formula

a(n) = A167262(3n,4). - R. J. Mathar, Oct 13 2024