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A199422 5*7^n+1. 1
6, 36, 246, 1716, 12006, 84036, 588246, 4117716, 28824006, 201768036, 1412376246, 9886633716, 69206436006, 484445052036, 3391115364246, 23737807549716, 166164652848006, 1163152569936036, 8142067989552246, 56994475926865716 (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 (8,-7).

FORMULA

a(n) = 6*A083067(n).

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

a(n) = 8*a(n-1)-7*a(n-2).

G.f.: 6*(1-2*x)/((1-x)*(1-7*x)).

MATHEMATICA

5*7^Range[0, 20]+1 (* or *) LinearRecurrence[{8, -7}, {6, 36}, 20] (* Harvey P. Dale, Dec 23 2012 *)

PROG

(MAGMA) [5*7^n+1: n in [0..30]];

CROSSREFS

Sequence in context: A001286 A180119 A181964 * A049431 A049428 A129063

Adjacent sequences:  A199419 A199420 A199421 * A199423 A199424 A199425

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Nov 07 2011

STATUS

approved

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Last modified June 23 23:39 EDT 2021. Contains 345403 sequences. (Running on oeis4.)