login
This site is supported by donations to The OEIS Foundation.

 

Logo

110 people attended OEIS-50 (videos, suggestions); annual fundraising drive to start soon (donate); editors, please edit! (stack is over 300), your editing is more valuable than any donation.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A005032 7*3^n. 7
7, 21, 63, 189, 567, 1701, 5103, 15309, 45927, 137781, 413343, 1240029, 3720087, 11160261, 33480783, 100442349, 301327047, 903981141, 2711943423, 8135830269, 24407490807, 73222472421, 219667417263, 659002251789, 1977006755367, 5931020266101, 17793060798303 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Milan Janjic, Enumerative Formulas for Some Functions on Finite Sets

Tanya Khovanova, Recursive Sequences

Index to sequences with linear recurrences with constant coefficients, signature (3).

FORMULA

G.f.: 7/(1-3*x). a(n) = 3*a(n-1), a(0)=7. - Vincenzo Librandi, Sep 15 2011

MAPLE

with(finance):seq(futurevalue(7, 2, n), n=0..22); # [From Zerinvary Lajos, Mar 25 2009]

MATHEMATICA

7*3^Range[0, 60] (* Vladimir Joseph Stephan Orlovsky, Jun 09 2011 *)

PROG

(MAGMA) [7*3^n: n in [0..30]]; // Vincenzo Librandi, Sep 15 2011

CROSSREFS

Sequence in context: A146139 A083596 A082541 * A152766 A152671 A113859

Adjacent sequences:  A005029 A005030 A005031 * A005033 A005034 A005035

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

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

Content is available under The OEIS End-User License Agreement .

Last modified October 26 02:56 EDT 2014. Contains 248566 sequences.