OFFSET

0,2

COMMENTS

LINKS

Index entries for linear recurrences with constant coefficients, signature (1, 1, 1, -1).

FORMULA

G.f.: (t^4 + 2*t^3 + 2*t^2 + 2*t + 1)/(t^4 - t^3 - t^2 - t + 1)

CROSSREFS

KEYWORD

nonn

AUTHOR

John Cannon and N. J. A. Sloane, Dec 03 2009

STATUS

approved