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A354067 Number of tilings of an n X n square using right trominoes, monominoes and 2 X 2 tiles. 2
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
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
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 16 2022
STATUS
approved

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Last modified May 23 18:59 EDT 2024. Contains 372765 sequences. (Running on oeis4.)