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A247443 Number of tilings of a 5 X n rectangle using n pentominoes of shapes F, L, Y. 10
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

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

FORMULA

G.f.: see link.

EXAMPLE

a(5) = 16:

._._______.        ._______._.

| | ._____|        |_. .___| |

| |_| ._| |        | |_| ._| |

| |_. |_. |        | |_. |_. |

|___|_| | |        | ._|_| |_|

|_______|_| (*8)   |_|_______| (*8)  .

MAPLE

# Maple program: see link.

CROSSREFS

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

Sequence in context: A129877 A307581 A261566 * A171734 A278746 A280217

Adjacent sequences:  A247440 A247441 A247442 * A247444 A247445 A247446

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Sep 23 2014

STATUS

approved

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Last modified October 16 21:10 EDT 2019. Contains 328103 sequences. (Running on oeis4.)