A199755 5*11^n+1.

6, 56, 606, 6656, 73206, 805256, 8857806, 97435856, 1071794406, 11789738456, 129687123006, 1426558353056, 15692141883606, 172613560719656, 1898749167916206, 20886240847078256, 229748649317860806, 2527235142496468856

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)-10.

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

G.f.: 2*(3-8*x)/((1-x)*(1-11*x)).

Mathematica

5*11^Range[0, 20]+1 (* or *) LinearRecurrence[{12, -11}, {6, 56}, 20] (* Harvey P. Dale, May 20 2019 *)

Prog

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

Crossrefs

Sequence in context: A371739 A048348 A227384 * A025749 A365766 A297705

Adjacent sequences: A199752 A199753 A199754 * A199756 A199757 A199758

Keyword

nonn,easy

Author

Vincenzo Librandi, Nov 10 2011

Status

approved