A206609 Fibonacci sequence beginning 13, 9.

13, 9, 22, 31, 53, 84, 137, 221, 358, 579, 937, 1516, 2453, 3969, 6422, 10391, 16813, 27204, 44017, 71221, 115238, 186459, 301697, 488156, 789853, 1278009, 2067862, 3345871, 5413733, 8759604, 14173337, 22932941, 37106278, 60039219, 97145497, 157184716

Offset: 1

Author

Vladimir Joseph Stephan Orlovsky, Feb 10 2012

Keywords

• nonn
• easy

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..1000
• Index entries for linear recurrences with constant coefficients, signature (1, 1).

Crossrefs

Cf. A000032, A000045, A206607, A206608.

Programs

Magma

I:=[13, 9]; [n le 2 select I[n] else Self(n-1)+Self(n-2): n in [1..40]]; // Vincenzo Librandi, Feb 16 2012

Mathematica

LinearRecurrence[{1, 1}, {13, 9}, 80]