OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
Index entries for linear recurrences with constant coefficients, signature (1,1).
FORMULA
a(n) = Fibonacci(n+5) + Fibonacci(n) + Fibonacci(n-6). - Greg Dresden and Aamen Muharram, Jul 22 2022
G.f.: x*(14 - 3*x)/(1 - x - x^2). - Stefano Spezia, Jul 22 2022
MATHEMATICA
LinearRecurrence[{1, 1}, {14, 11}, 80]
PROG
(Magma) I:=[14, 11]; [n le 2 select I[n] else Self(n-1)+ Self(n-2): n in [1..40]]; // Vincenzo Librandi, Feb 16 2012
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vladimir Joseph Stephan Orlovsky, Feb 16 2012
STATUS
approved