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A198968 11*9^n-1. 1
10, 98, 890, 8018, 72170, 649538, 5845850, 52612658, 473513930, 4261625378, 38354628410, 345191655698, 3106724901290, 27960524111618, 251644717004570, 2264802453041138, 20383222077370250, 183448998696332258, 1651040988266990330 (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 (10,-9).

FORMULA

a(n) = 9*a(n-1)+8. a(n) = 10*a(n-1)-9*a(n-2), n>1.

G.f.: 2*(5 - x)/(1 - 10*x + 9*x^2). - Vincenzo Librandi, Jan 03 2013

MATHEMATICA

CoefficientList[Series[2*(5 - x)/(1 - 10*x + 9*x^2), {x, 0, 30}], x] (* Vincenzo Librandi, Jan 03 2013 *)

LinearRecurrence[{10, -9}, {10, 98}, 30] (* Harvey P. Dale, Jun 26 2013 *)

PROG

(MAGMA) [11*9^n-1: n in [0..20]]

CROSSREFS

Sequence in context: A190985 A044642 A264462 * A125946 A158513 A125880

Adjacent sequences:  A198965 A198966 A198967 * A198969 A198970 A198971

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Nov 01 2011

STATUS

approved

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Last modified April 10 14:07 EDT 2021. Contains 342845 sequences. (Running on oeis4.)