A199316 11*5^n+1.

12, 56, 276, 1376, 6876, 34376, 171876, 859376, 4296876, 21484376, 107421876, 537109376, 2685546876, 13427734376, 67138671876, 335693359376, 1678466796876, 8392333984376, 41961669921876, 209808349609376, 1049041748046876

Offset

0,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (6,-5).

Formula

a(n) = 5*a(n-1)-4.

a(n) = 6*a(n-1)-5*a(n-2).

G.f.: 4*(3-4*x)/((1-x)*(1-5*x)).

Mathematica

LinearRecurrence[{6, -5}, {12, 56}, 30] (* Harvey P. Dale, Aug 03 2014 *)

Prog

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

Crossrefs

Sequence in context: A009827 A068418 A068414 * A081756 A307741 A027147

Adjacent sequences: A199313 A199314 A199315 * A199317 A199318 A199319

Keyword

nonn,easy

Author

Vincenzo Librandi, Nov 05 2011

Status

approved