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A225585
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Floor((3^n-1)/n).
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1
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2, 4, 8, 20, 48, 121, 312, 820, 2186, 5904, 16104, 44286, 122640, 341640, 956593, 2690420, 7596480, 21523360, 61171656, 174339220, 498112057, 1426411800, 4093181688, 11767897353, 33891544377, 97764070320, 282429536480, 817028301962, 2366564736720
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OFFSET
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1,1
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 1..300
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MATHEMATICA
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Table[Floor[(3^n - 1) / n], {n, 30}] (* or *) Table[Quotient[3^n - 1, n], {n, 30}]
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PROG
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(MAGMA) [Floor((3^n-1)/n): n in [1..30]];
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CROSSREFS
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Cf. A003462, A007051, A024023, A034472, A082482, A092763.
Sequence in context: A288476 A338197 A056952 * A121703 A301467 A275070
Adjacent sequences: A225582 A225583 A225584 * A225586 A225587 A225588
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KEYWORD
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nonn,easy
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AUTHOR
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Vincenzo Librandi, May 30 2013
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STATUS
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approved
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