A354067 - OEIS

A354067

Number of tilings of an n X n square using right trominoes, monominoes and 2 X 2 tiles.

1, 1, 6, 47, 3376, 475962, 355724934, 777719132265, 6953251175836902, 211458363740571796706, 24140111818602303894344572, 9821069154293248979055457847110, 14628885986751823763315761493151275720, 78680004562091421665338332919348995334919722

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

OFFSET

0,3

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..16

Wikipedia, Polyomino

FORMULA

a(n) = A353963(n,n).

EXAMPLE

a(2) = 6:

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

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

|___| |_|_| |_|_| |___| |_|_| |___| .

CROSSREFS

Main diagonal of A353963.

Sequence in context: A192887 A321190 A320403 * A357430 A323138 A000252

Adjacent sequences: A354064 A354065 A354066 * A354068 A354069 A354070

KEYWORD

nonn

AUTHOR

Alois P. Heinz, May 16 2022

STATUS

approved