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A013827 a(n) = 3^(5*n + 2). 2
9, 2187, 531441, 129140163, 31381059609, 7625597484987, 1853020188851841, 450283905890997363, 109418989131512359209, 26588814358957503287787, 6461081889226673298932241, 1570042899082081611640534563 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
Tanya Khovanova, Recursive Sequences
FORMULA
From Philippe Deléham, Nov 26 2008: (Start)
a(n) = 243*a(n-1), n > 0; a(0)=9.
G.f.: 9/(1-243*x).
a(n) = 3*A013826(n). (End)
MATHEMATICA
3^(5*Range[0, 20]+2) (* or *) NestList[243#&, 9, 20] (* Harvey P. Dale, Feb 05 2020 *)
PROG
(Magma) [3^(5*n+2): n in [0..15]]; // Vincenzo Librandi, Jul 07 2011
(PARI) a(n)=3^(5*n+2) \\ Charles R Greathouse IV, Jul 11 2016
CROSSREFS
Cf. A000244 (3^n), A016873 (5*n+2).
Sequence in context: A162091 A172959 A250915 * A058428 A323517 A278914
KEYWORD
nonn,easy
AUTHOR
STATUS
approved

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Last modified May 25 06:28 EDT 2024. Contains 372782 sequences. (Running on oeis4.)