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A013787 a(n) = 7^(4*n + 3). 2
343, 823543, 1977326743, 4747561509943, 11398895185373143, 27368747340080916343, 65712362363534280139543, 157775382034845806615042743, 378818692265664781682717625943, 909543680129861140820205019889143, 2183814375991796599109312252753832343 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
Tanya Khovanova, Recursive Sequences
FORMULA
From Philippe Deléham, Dec 02 2008: (Start)
a(n) = 2401*a(n-1); a(0)=343.
G.f.: 343/(1-2401*x).
a(n) = 49*A013786(n). (End)
MATHEMATICA
7^(4*Range[0, 10]+3) (* or *) NestList[2401#&, 343, 10] (* Harvey P. Dale, Sep 09 2021 *)
PROG
(Magma) [7^(4*n+3): n in [0..15]]; // Vincenzo Librandi, Jun 28 2011
(Maxima) makelist(7^(4*n+3), n, 0, 20); /* Martin Ettl, Oct 21 2012 */
(PARI) a(n)=7^(4*n+3) \\ Charles R Greathouse IV, Jul 11 2016
CROSSREFS
Sequence in context: A046236 A294663 A222460 * A013844 A013306 A044878
KEYWORD
nonn,easy
AUTHOR
STATUS
approved

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Last modified May 19 14:45 EDT 2024. Contains 372698 sequences. (Running on oeis4.)