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A286391
Number of tilings of a 6 X n rectangle using pentominoes of shapes X, Y, Z, T and monominoes.
3
1, 1, 15, 344, 6835, 119392, 2136080, 38329669, 688355077, 12374676591, 222673114420, 4005005917279, 72004800735036, 1294444641691072, 23273376392535695, 418470613768822683, 7524342117053834729, 135288703461639048592, 2432489164334993344213
OFFSET
0,3
LINKS
Wikipedia, Pentomino
EXAMPLE
a(2) = 15:
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KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 08 2017
STATUS
approved