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A199317 2*6^n+1. 1
3, 13, 73, 433, 2593, 15553, 93313, 559873, 3359233, 20155393, 120932353, 725594113, 4353564673, 26121388033, 156728328193, 940369969153, 5642219814913, 33853318889473, 203119913336833, 1218719480020993, 7312316880125953, 43873901280755713 (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 (7,-6).

FORMULA

a(n) = 6*a(n-1)-5.

a(n) = 7*a(n-1)-6*a(n-2).

G.f.: (3-8*x)/((1-x)*(1-6*x)).

PROG

(MAGMA) [2*6^n+1: n in [0..30]];

CROSSREFS

Sequence in context: A067764 A193930 A063512 * A205776 A132846 A193931

Adjacent sequences:  A199314 A199315 A199316 * A199318 A199319 A199320

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Nov 05 2011

STATUS

approved

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Last modified August 29 05:24 EDT 2015. Contains 261185 sequences.