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A199114 11*3^n+1. 1
12, 34, 100, 298, 892, 2674, 8020, 24058, 72172, 216514, 649540, 1948618, 5845852, 17537554, 52612660, 157837978, 473513932, 1420541794, 4261625380, 12784876138, 38354628412, 115063885234, 345191655700, 1035574967098, 3106724901292 (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(n) = 4*a(n-1)-3*a(n-2).

G.f.: 2*(6-7*x)/((1-x)*(1-3*x)).  - Bruno Berselli, Nov 04 2011

a(n) = 2*A199113(n). - R. J. Mathar, Nov 01 2015

PROG

(MAGMA) [11*3^n+1: n in [0..30]];

CROSSREFS

Sequence in context: A124705 A296154 A126366 * A009760 A078194 A034510

Adjacent sequences:  A199111 A199112 A199113 * A199115 A199116 A199117

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Nov 04 2011

STATUS

approved

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Last modified June 14 05:51 EDT 2021. Contains 345018 sequences. (Running on oeis4.)