A286391 - OEIS

A286391

Number of tilings of a 6 X n rectangle using pentominoes of shapes X, Y, Z, T and monominoes.

1, 1, 15, 344, 6835, 119392, 2136080, 38329669, 688355077, 12374676591, 222673114420, 4005005917279, 72004800735036, 1294444641691072, 23273376392535695, 418470613768822683, 7524342117053834729, 135288703461639048592, 2432489164334993344213

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..800

Wikipedia, Pentomino

EXAMPLE

a(2) = 15:

.___. .___. .___. .___. .___. .___. .___. .___. .___.

|_|_| | |_| |_| | | |_| |_|_| |_|_| |_|_| |_|_| | |_|

|_|_| | ._| |_. | | ._| | |_| |_|_| |_|_| | |_| | |_|

|_|_| | | | | | | | |_| | ._| | |_| | |_| | |_| | ._|

|_|_| |_| | | |_| |_|_| | |_| | ._| | |_| | ._| |_|_|

|_|_| |_. | | ._| |_|_| |_|_| | |_| | ._| |_|_| |_|_|

|_|_| |_|_| |_|_| |_|_| |_|_| |_|_| |_|_| |_|_| |_|_|

.___. .___. .___. .___. .___. .___.

|_| | |_|_| |_|_| |_|_| |_|_| |_| |

|_. | |_| | |_|_| |_|_| |_| | |_| |

|_| | |_. | |_| | |_| | |_| | |_. |

|_|_| |_| | |_. | |_| | |_. | |_|_|

|_|_| |_|_| |_| | |_. | |_|_| |_|_|

|_|_| |_|_| |_|_| |_|_| |_|_| |_|_| .

CROSSREFS

Cf. A247125, A278330, A278456, A278657, A278877, A278964, A286347.

Sequence in context: A157965 A321850 A100875 * A034975 A012787 A216449

Adjacent sequences: A286388 A286389 A286390 * A286392 A286393 A286394

KEYWORD

nonn

AUTHOR

Alois P. Heinz, May 08 2017

STATUS

approved