A199754 (5*11^n+1)/2.

3, 28, 303, 3328, 36603, 402628, 4428903, 48717928, 535897203, 5894869228, 64843561503, 713279176528, 7846070941803, 86306780359828, 949374583958103, 10443120423539128, 114874324658930403, 1263617571248234428

Offset

0,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..900

Index entries for linear recurrences with constant coefficients, signature (12,-11).

Formula

a(n) = 11*a(n-1)-5.

a(n) = 12*a(n-1)-11*a(n-2).

G.f.: (3-8*x)/((1-x)*(1-11*x)).

Mathematica

(5 11^Range[0, 20]+1)/2 (* or *) LinearRecurrence[{12, -11}, {3, 28}, 20] (* Harvey P. Dale, Apr 12 2022 *)

Prog

(Magma) [(5*11^n+1)/2: n in [0..30]];

Crossrefs

Sequence in context: A239297 A287884 A250890 * A277507 A176335 A072343

Adjacent sequences: A199751 A199752 A199753 * A199755 A199756 A199757

Keyword

nonn,easy

Author

Vincenzo Librandi, Nov 10 2011

Status

approved