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A155672 11^n-9^n+1^n 2
1, 3, 41, 603, 8081, 102003, 1240121, 14704203, 171312161, 1970527203, 22450640201, 253930611003, 2855998840241, 31980846315603, 356873041128281, 3971357037321003, 44096709674720321, 488769846799627203 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..17.

Index entries for linear recurrences with constant coefficients, signature (21,-119,99).

FORMULA

G.f.: 1/(1-11*x)-1/(1-9*x)+1/(1-x). E.g.f.: e^(11*x)-e^(9*x)+e^x.

a(n)=20*a(n-1)-99*a(n-2)+80 with a(0)=1, a(1)=3 [From Vincenzo Librandi, Jul 21 2010]

MATHEMATICA

Table[11^n-9^n+1, {n, 0, 30}] (* or *) LinearRecurrence[{21, -119, 99}, {1, 3, 41}, 30] (* Harvey P. Dale, May 07 2019 *)

CROSSREFS

A155654, A155655, A155656, A155657, A155658, A155659, A155660, A155661, A155662, A155663, A155664, A155665, A155666, A155667, A155668, A155669, A155670, A155671

Sequence in context: A305667 A213378 A189356 * A073844 A138961 A075022

Adjacent sequences:  A155669 A155670 A155671 * A155673 A155674 A155675

KEYWORD

nonn

AUTHOR

Mohammad K. Azarian, Feb 01 2009

STATUS

approved

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Last modified November 17 23:26 EST 2019. Contains 329242 sequences. (Running on oeis4.)