A247443 Number of tilings of a 5 X n rectangle using n pentominoes of shapes F, L, Y.

1, 0, 2, 0, 6, 16, 32, 104, 186, 800, 1700, 4836, 11186, 29940, 84388, 208808, 563364, 1391664, 3787510, 9824684, 25712276, 66815444, 173151378, 457266220, 1188536784, 3113743272, 8087358736, 21152284376, 55283003950, 144314582896, 376852311434, 982507243820

Offset: 0

Author

Alois P. Heinz, Sep 23 2014

Keywords

• nonn

Examples

			a(5) = 16:
._._______.        ._______._.
| | ._____|        |_. .___| |
| |_| ._| |        | |_| ._| |
| |_. |_. |        | |_. |_. |
|___|_| | |        | ._|_| |_|
|_______|_| (*8)   |_|_______| (*8)  .
		

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..1000
• Alois P. Heinz, G.f. and Maple program for A247443
• Wikipedia, Pentomino

Crossrefs

Cf. A174249, A233427, A234312, A234931, A247680, A248102, A249762.

Programs

Maple

# Maple program: see link.

Formula

G.f.: see link.