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A278456
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Number of tilings of a 5 X n rectangle using pentominoes of any shape and monominoes.
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6
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1, 2, 50, 1954, 56864, 1532496, 42238426, 1178422563, 32890293494, 917103556607, 25552076570350, 711923354658732, 19838824712825618, 552851181380560869, 15406086995815163663, 429312063890812931103, 11963383230714027535776, 333377000620725693771782
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OFFSET
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0,2
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LINKS
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EXAMPLE
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a(1) = 2:
._. ._.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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