OFFSET
0,3
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..600
EXAMPLE
a(2) = 2, because there are 2 tilings of a 6 X 2 rectangle using straight (3 X 1) trominoes and 2 X 2 tiles:
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CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Dec 02 2012
STATUS
approved