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A189800
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a(n) = 6*a(n-1) + 8*a(n-2), with a(0)=0, a(1)=1.
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4
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0, 1, 6, 44, 312, 2224, 15840, 112832, 803712, 5724928, 40779264, 290475008, 2069084160, 14738305024, 104982503424, 747801460736, 5326668791808, 37942424436736, 270267896954880, 1925146777223168, 13713023838978048, 97679317251653632, 695780094221746176
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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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MATHEMATICA
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LinearRecurrence[{6, 8}, {0, 1}, 50]
CoefficientList[Series[-(x/(-1+6 x+8 x^2)), {x, 0, 50}], x] (* Harvey P. Dale, Jul 26 2011 *)
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PROG
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(Magma) I:=[0, 1]; [n le 2 select I[n] else 6*Self(n-1)+8*Self(n-2): n in [1..30]]; // Vincenzo Librandi, Nov 14 2011
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CROSSREFS
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Sequences of the form a(n) = c*a(n-1) + d*a(n-2), with a(0)=0, a(1)=1:
c/d...1.......2.......3.......4.......5.......6.......7.......8.......9......10
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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