OFFSET
0,4
FORMULA
E.g.f.: A(x)=B(x)-1/B(x)-1 where B(x)=(2+3*x+(5+12*x+9*x^2)^(1/2))^(1/3). [From Vladeta Jovovic, Jan 24 2009]
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Jan 23 2009
EXTENSIONS
More terms from Vladeta Jovovic, Jan 24 2009
STATUS
approved