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A013732 3^(3n+1). 4
3, 81, 2187, 59049, 1594323, 43046721, 1162261467, 31381059609, 847288609443, 22876792454961, 617673396283947, 16677181699666569, 450283905890997363, 12157665459056928801, 328256967394537077627, 8862938119652501095929 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Tanya Khovanova, Recursive Sequences

Index entries for linear recurrences with constant coefficients, signature (27).

FORMULA

a(n)=27*a(n-1), n>0 ; a(0)=3 . G.f.: 3/(1-27*x). - Philippe Deléham, Nov 25 2008

MAPLE

seq(3^(3*n+1), n=0..15); # Nathaniel Johnston, Jun 26 2011

PROG

(MAGMA) [3^(3*n+1): n in [0..25]]; // Vincenzo Librandi, May 25 2011

(PARI) a(n)=3^(3*n+1) \\ Charles R Greathouse IV, Jul 11 2016

CROSSREFS

Cf. A013730, A013733, A013734.

Sequence in context: A223187 A060851 A116179 * A209587 A223736 A207229

Adjacent sequences:  A013729 A013730 A013731 * A013733 A013734 A013735

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified April 30 22:38 EDT 2017. Contains 285697 sequences.