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A120354 a(n) = 11*3^n. 2
11, 33, 99, 297, 891, 2673, 8019, 24057, 72171, 216513, 649539, 1948617, 5845851, 17537553, 52612659, 157837977, 473513931, 1420541793, 4261625379, 12784876137, 38354628411, 115063885233, 345191655699, 1035574967097, 3106724901291, 9320174703873 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Square root of A120353.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..300

Tanya Khovanova, Recursive Sequences

Index entries for linear recurrences with constant coefficients, signature (3).

FORMULA

a(n) = 3*a(n-1), n>0 ; a(0)=11. G.f.: 11/(1-3*x). [Philippe Deléham, Nov 23 2008]

a(n) = 11* A000244(n). - Michel Marcus, Sep 04 2013

MATHEMATICA

11*3^Range[0, 60] (* Vladimir Joseph Stephan Orlovsky, Jun 09 2011 *)

NestList[3#&, 11, 30] (* Harvey P. Dale, Mar 04 2013 *)

PROG

(MAGMA) [11*3^n: n in [0..30]]; // Vincenzo Librandi, Jun 10 2011

(PARI) a(n)=11*3^n \\ Charles R Greathouse IV, Sep 04 2013

CROSSREFS

Sequence in context: A163673 A212132 A027025 * A206527 A213973 A262913

Adjacent sequences:  A120351 A120352 A120353 * A120355 A120356 A120357

KEYWORD

nonn,easy

AUTHOR

Anton Joha, Jun 25 2006

EXTENSIONS

Better definition from Tanya Khovanova, Jan 20 2007

STATUS

approved

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Last modified November 20 12:30 EST 2017. Contains 294971 sequences.