0,3

G.f.: (1-2x-2x^2-x^3- sqrt (1-4x^2-10x^3-4x^4+x^6))/(2x(x^4+3x^3+4x^2+x-1)).

Sequence in context: A096576 A126874 A121811 this_sequence A018032 A086808 A151347

Adjacent sequences: A164583 A164584 A164585 this_sequence A164587 A164588 A164589

easy,nonn

Paul Barry (pbarry(AT)wit.ie), Aug 17 2009