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A198645 10*3^n-1. 2
9, 29, 89, 269, 809, 2429, 7289, 21869, 65609, 196829, 590489, 1771469, 5314409, 15943229, 47829689, 143489069, 430467209, 1291401629, 3874204889, 11622614669, 34867844009, 104603532029, 313810596089, 941431788269, 2824295364809 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

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

Index entries for linear recurrences with constant coefficients, signature (4,-3).

FORMULA

a(n) = 3*a(n-1)+2, a(0)=9.

G.f. ( 9-7*x ) / ( (3*x-1)*(x-1) ). - R. J. Mathar, Oct 30 2011

PROG

(MAGMA) [10*3^n-1: n in [0..30]]

CROSSREFS

Cf. A048473.

Sequence in context: A318742 A024922 A193004 * A045862 A035075 A103535

Adjacent sequences:  A198642 A198643 A198644 * A198646 A198647 A198648

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Oct 28 2011

STATUS

approved

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Last modified March 18 11:15 EDT 2019. Contains 321283 sequences. (Running on oeis4.)