OFFSET
0,2
LINKS
FORMULA
G.f.: (1-x)/(1-3*x-x^3).
MATHEMATICA
LinearRecurrence[{3, 0, 1}, {1, 2, 6}, 30] (* Harvey P. Dale, Nov 02 2024 *)
CROSSREFS
KEYWORD
easy,nonn,changed
AUTHOR
Philippe Deléham, Dec 14 2011
EXTENSIONS
Corrected by R. J. Mathar, Dec 15 2011
STATUS
approved