This site is supported by donations to The OEIS Foundation.

 Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS". Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.