0,3

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

Cf. A007420.

Sequence in context: A151928 A021355 A110003 this_sequence A104772 A088156 A019193

Adjacent sequences: A035299 A035300 A035301 this_sequence A035303 A035304 A035305

sign

N. J. A. Sloane (njas(AT)research.att.com).