A199312 (9*5^n+1)/2.

5, 23, 113, 563, 2813, 14063, 70313, 351563, 1757813, 8789063, 43945313, 219726563, 1098632813, 5493164063, 27465820313, 137329101563, 686645507813, 3433227539063, 17166137695313, 85830688476563, 429153442382813, 2145767211914063

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)-2.

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

G.f.: (5-7*x)/((1-x)*(1-5*x)).

Prog

(Magma) [(9*5^n+1)/2: n in [0..30]];

Crossrefs

Sequence in context: A360100 A178873 A186652 * A320326 A299589 A113284

Adjacent sequences: A199309 A199310 A199311 * A199313 A199314 A199315

Keyword

nonn,easy

Author

Vincenzo Librandi, Nov 05 2011

Status

approved