A199032 a(n) = 3*12^n-1.

2, 35, 431, 5183, 62207, 746495, 8957951, 107495423, 1289945087, 15479341055, 185752092671, 2229025112063, 26748301344767, 320979616137215, 3851755393646591, 46221064723759103, 554652776685109247, 6655833320221310975

Offset

0,1

Links

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

Index entries for linear recurrences with constant coefficients, signature (13,-12).

Formula

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

a(n) = 13*a(n-1)-12*a(n-2).

G.f.: (2+9*x)/((1-x)*(1-12*x)). - Bruno Berselli, Nov 03 2011

Mathematica

3*12^Range[0, 30]-1 (* or *) LinearRecurrence[{13, -12}, {2, 35}, 30] (* Harvey P. Dale, Apr 20 2015 *)

Prog

(Magma) [3*12^n-1 : n in [0..20]]

Crossrefs

Sequence in context: A089660 A058089 A055519 * A369470 A218119 A350340

Adjacent sequences: A199029 A199030 A199031 * A199033 A199034 A199035

Keyword

nonn,easy

Author

Vincenzo Librandi, Nov 03 2011

Status

approved