A199678 10*9^n+1.

11, 91, 811, 7291, 65611, 590491, 5314411, 47829691, 430467211, 3874204891, 34867844011, 313810596091, 2824295364811, 25418658283291, 228767924549611, 2058911320946491, 18530201888518411, 166771816996665691, 1500946352969991211

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).

G.f.: (11-19*x)/((1-x)*(1-9*x)).

Prog

(Magma) [10*9^n+1: n in [0..30]];

Crossrefs

Sequence in context: A245599 A126532 A226868 * A377943 A201549 A117611

Adjacent sequences: A199675 A199676 A199677 * A199679 A199680 A199681

Keyword

nonn,easy

Author

Vincenzo Librandi, Nov 09 2011

Status

approved