A247113 Number of tilings of a 9 X 4n rectangle with 9n tetrominoes of any shape.

1, 179399, 517312744806, 2045387873615550415, 8355513115448789147187273, 34243737232278596352691552132065, 140387532129057613906130882433658669281, 575558645377903777492614229836093710424726422, 2359673678366714374809214450385908918997931183691473

Offset: 0

Author

Alois P. Heinz, Nov 19 2014

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..40
• S. Butler, J. Ekstrand, S. Osborne, TETRIS Tiling, AMS Spring Central Sectional, Iowa State University, April 27-28 2013
• R. S. Harris, Counting Polyomino Tilings
• Wikipedia, Tetris
• Wikipedia, Tetromino

Crossrefs

Quadrisection of column k=9 of A230031.