Straight Trominoes on a 3 × 12 Board
In how many ways can a 3 × 12 rectangle (3 rows, 12 columns) be tiled exactly by twelve 1 × 3 straight trominoes, each placed horizontally or vertically? Tilings related by a symmetry of the rectangle count as different. Give an integer.
Related problems & prerequisites
Worth solving first
- Dominoes and Big Squares 4.0/10
- Tiling with Dominoes 3.9/10
- No Consecutive Elements 3.5/10
Source: Original problem written for AxiomIQ.