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A177095 9^n - 8. 3
1, 73, 721, 6553, 59041, 531433, 4782961, 43046713, 387420481, 3486784393, 31381059601, 282429536473, 2541865828321, 22876792454953, 205891132094641, 1853020188851833, 16677181699666561, 150094635296999113 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
FORMULA
G.f.: x*(1 + 63*x)/(1 - 10*x + 9*x^2). - Vincenzo Librandi, Feb 06 2013
a(n) = 10*a(n-1) - 9*a(n-2) for n>2, a(1)=1, a(2)=73. - Vincenzo Librandi, Feb 06 2013
MATHEMATICA
CoefficientList[Series[(1 + 63 x)/(1 - 10 x + 9 x^2), {x, 0, 30}], x] (* Vincenzo Librandi, Feb 06 2013 *)
LinearRecurrence[{10, -9}, {1, 73}, 20] (* Harvey P. Dale, May 22 2014 *)
PROG
(Magma) [9^n-8: n in [1..20]];
CROSSREFS
Equals A001019(n)-8.
Sequence in context: A210383 A142675 A167187 * A321422 A133753 A177514
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 15 2010
STATUS
approved

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Last modified April 17 13:58 EDT 2024. Contains 371764 sequences. (Running on oeis4.)