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A220127
Number of tilings of a 10 X n rectangle using integer-sided rectangular tiles of area 10.
2
1, 1, 2, 3, 5, 9, 15, 26, 44, 75, 254, 470, 1130, 2150, 4369, 8889, 17112, 33235, 62619, 117687, 259213, 500978, 1073742, 2114851, 4334588, 8817832, 17673956, 35420952, 69871967, 137274169, 281650158, 556043329, 1139084899, 2264971273, 4589226181, 9256382600
OFFSET
0,3
LINKS
EXAMPLE
a(4) = 5, because there are 5 tilings of a 10 X 4 rectangle using integer-sided rectangular tiles of area 10:
._._._._. .___._._. ._.___._. ._._.___. .___.___.
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| | | | | |___| | | | |___| | | | |___| |___|___|
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|_|_|_|_| |___|_|_| |_|___|_| |_|_|___| |___|___|
CROSSREFS
Column k=10 of A220122.
Sequence in context: A114140 A302018 A096816 * A286887 A018157 A228644
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Dec 06 2012
STATUS
approved