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A174249
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Number of tilings of a 5 X n rectangle with n pentominoes of any shape.
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81
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1, 1, 5, 56, 501, 4006, 27950, 214689, 1696781, 13205354, 101698212, 782267786, 6048166230, 46799177380, 361683136647, 2793722300087, 21583392631817, 166790059833039, 1288885349447958, 9959188643348952, 76953117224941654, 594617039453764617, 4594660583890506956
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OFFSET
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0,3
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LINKS
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FORMULA
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a(n) ~ c * d^n, where d =
7.727036840800092392128639105511391434436212757335030092041375597587338371937..., c =
0.13364973920881772493778581621701653927538155984099992758656160782495174... (1/d is the root of the denominator, see g.f.). - Vaclav Kotesovec, May 19 2015
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CROSSREFS
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Row sums of A247702, A247703, A247704, A247705, A247706, A247707, A247708, A247709, A247710, A247711, A247712, A247713.
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KEYWORD
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nonn,easy
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AUTHOR
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Bob Harris (me13013(AT)gmail.com), Mar 13 2010
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EXTENSIONS
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STATUS
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approved
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