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A199308 (7*5^n+1)/4. 1
2, 9, 44, 219, 1094, 5469, 27344, 136719, 683594, 3417969, 17089844, 85449219, 427246094, 2136230469, 10681152344, 53405761719, 267028808594, 1335144042969, 6675720214844, 33378601074219, 166893005371094, 834465026855469 (list; graph; refs; listen; history; text; internal format)
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)-1.

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

G.f.: (2-3*x)/((1-x)*(1-5*x)).

PROG

(MAGMA) [(7*5^n+1)/4: n in [0..30]];

CROSSREFS

Sequence in context: A259777 A013981 A216861 * A176479 A162356 A026302

Adjacent sequences:  A199305 A199306 A199307 * A199309 A199310 A199311

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Nov 05 2011

STATUS

approved

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Last modified February 26 02:19 EST 2020. Contains 332270 sequences. (Running on oeis4.)