A199559 2*9^n+1.

3, 19, 163, 1459, 13123, 118099, 1062883, 9565939, 86093443, 774840979, 6973568803, 62762119219, 564859072963, 5083731656659, 45753584909923, 411782264189299, 3706040377703683, 33354363399333139, 300189270593998243

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.: (3-11*x)/((1-x)*(1-9*x)).

Prog

(Magma) [2*9^n+1: n in [0..30]];

Crossrefs

Sequence in context: A232691 A057719 A289258 * A136474 A337818 A183069

Adjacent sequences: A199556 A199557 A199558 * A199560 A199561 A199562

Keyword

nonn,easy

Author

Vincenzo Librandi, Nov 08 2011

Status

approved