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A225585 Floor((3^n-1)/n). 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Table[Floor[(3^n - 1) / n], {n, 30}] (* or *) Table[Quotient[3^n - 1, n], {n, 30}]
PROG
(Magma) [Floor((3^n-1)/n): n in [1..30]];
CROSSREFS
Sequence in context: A338197 A056952 A369496 * A121703 A301467 A358056
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, May 30 2013
STATUS
approved

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Last modified July 20 03:53 EDT 2024. Contains 374441 sequences. (Running on oeis4.)