OFFSET
0,6
LINKS
Roger Bagula, Factoring Double Fibonacci Sequences, 2000.
Index entries for linear recurrences with constant coefficients, signature (4,-3,-2,1).
FORMULA
MATHEMATICA
F[1] = 1; F[2] = 1; F[3] = 1; F[4] = 1; F[n__] := F[n] = 4*F[n - 1] - 3*F[n - 2] - 2*F[n - 3] + F[n - 4] a = Table[Abs[F[n]], {n, 1, 50}]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Roger L. Bagula, Jun 05 2005
EXTENSIONS
Definition replaced by recurrence by the Associate Editors of the OEIS, Sep 28 2009
STATUS
approved