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A219873 Number of tilings of a 10 X n rectangle using dominoes and straight (3 X 1) trominoes. 2
1, 7, 506, 58002, 4631107, 458901955, 43427618185, 4095897476480, 392127322268846, 37197513508819191, 3541054185616706122, 337034306456285944790, 32054951461147041813900, 3050527403495695959369072, 290235791993563362905189432, 27614468898770593799634611889 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
EXAMPLE
a(1) = 7, because there are 7 tilings of a 10 X 1 rectangle using dominoes and straight (3 X 1) trominoes:
._. ._. ._. ._. ._. ._. ._.
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CROSSREFS
Column k=10 of A219866.
Sequence in context: A122523 A293180 A203472 * A224469 A347907 A320980
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Nov 30 2012
STATUS
approved

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Last modified March 4 02:53 EST 2024. Contains 370522 sequences. (Running on oeis4.)