A232759 Number of tilings of a 7 X 4n rectangle with 7n tetrominoes of any shape.

1, 9157, 657253434, 58480141962875, 5316709999497259059, 484393789403397886429249, 44141190389848159904786733934, 4022519784390988451174562198889336, 366566828291367228800261059891047626895, 33404748935117787113145811582089363383972226

Offset: 0

Author

Alois P. Heinz, Nov 29 2013

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..70
• 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=7 of A230031.