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A364638
Number of tilings of a 9 X n rectangle using dominoes and trominoes (of any shape).
2
1, 5, 1875, 411963, 85734771, 19483629663, 4189728321930, 917767233766444, 200672595297189586, 43796355965749584514, 9661365299560395267479, 2130488299494993492107838, 469852091641921488562840573, 103620193808076227633719117673, 22851767067396755152956201847419
OFFSET
0,2
LINKS
Wikipedia, Tromino
EXAMPLE
a(1) = 5:
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CROSSREFS
Column k=9 of A364457.
Sequence in context: A330057 A324265 A003733 * A201300 A024073 A301532
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jul 30 2023
STATUS
approved