OFFSET
0,4
LINKS
Index entries for linear recurrences with constant coefficients, signature (1,3,0,-3).
FORMULA
Limit a(n)/a(n-1)=2.1038034027..
G.f.: x*(-1+2*x^2)/((1-x) * (3*x^3+3*x^2-1)). [Sep 28 2009]
MATHEMATICA
m = 3 a[0] = 0; a[1] = 1; a[2] = 1; a[3] = 2; a[n_] := a[n] = a[n - 1] + m*a[n - 2] - m*a[n - 4] digits = 50 aa = Table[a[n], {n, 0, digits}]
LinearRecurrence[{1, 3, 0, -3}, {0, 1, 1, 2}, 40] (* Harvey P. Dale, Aug 24 2017 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Roger L. Bagula, May 24 2005
EXTENSIONS
Definition replaced by recurrence by the Associate Editors of the OEIS, Sep 28 2009
STATUS
approved