Crescent polyomino

Crescent polyominoes are polyominoes that are orthogonally directed in three directions. This creates concavities only on one side, thus creating a “crescent” shape. By definition, they are both bent trees and range charts.

Symbol

Dir30\textrm{Dir}_{3}^{0}

Regex

ru(ru|lu)*ld(ld)*(rd)*

Symmetries

State Diagram

rululdrd

Polyomino list

ruluruld2rd
6
7
8
ru2luruld2rd
7
8
ruluruld2rd2
7
8
ruluru2ld2rd
8
ru2lurululd2rd
8
ru2luruld3rd
8
ru2luruld2rd2
8
ruluruld3rd2
8
ruluru2ld3rd
8