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0, 3, 39, 387, 3471, 29643, 246519, 2019027, 16386591, 132264603, 1063976199, 8541106467, 68475336111, 548535110763, 4391942995479, 35153854510707, 281322388820031, 2251036874232123, 18010583812216359, 144096114589527747, 1152826137175206351
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = 13*a(n-1) - 40*a(n-2).
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MATHEMATICA
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Table[8^n-5^n, {n, 0, 20}] (* or *) LinearRecurrence[{13, -40}, {0, 3}, 30] (* Harvey P. Dale, Dec 04 2012 *)
CoefficientList[Series[3 x/((1 - 5 x) (1 - 8 x)), {x, 0, 30}], x] (* Vincenzo Librandi, Oct 05 2014 *)
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PROG
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(Magma) [8^n - 5^n: n in [0..20]];
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CROSSREFS
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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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