A199321 7*6^n+1.

8, 43, 253, 1513, 9073, 54433, 326593, 1959553, 11757313, 70543873, 423263233, 2539579393, 15237476353, 91424858113, 548549148673, 3291294892033, 19747769352193, 118486616113153, 710919696678913, 4265518180073473, 25593109080440833

Offset

0,1

Links

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

Index entries for linear recurrences with constant coefficients, signature (7,-6).

Formula

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

a(n) = 7*a(n-1)-6*a(n-2).

G.f.: (8-13*x)/((1-x)*(1-6*x)).

Prog

(Magma) [7*6^n+1: n in [0..30]];

Crossrefs

Sequence in context: A034361 A117617 A111365 * A346198 A144039 A282189

Adjacent sequences: A199318 A199319 A199320 * A199322 A199323 A199324

Keyword

nonn,easy

Author

Vincenzo Librandi, Nov 06 2011

Status

approved