OFFSET
0,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..75
EXAMPLE
a(1) = 5, because there are 5 tilings of a 9 X 1 rectangle using dominoes and straight (3 X 1) trominoes:
._. ._. ._. ._. ._.
| | | | | | | | | |
| | |_| |_| |_| | |
|_| | | | | | | |_|
| | |_| |_| | | | |
| | | | | | |_| |_|
|_| |_| | | | | | |
| | | | |_| |_| |_|
| | | | | | | | | |
|_| |_| |_| |_| |_|
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Nov 30 2012
STATUS
approved