2,1

Conjecture: G.f.: x^2*(-7-8*x^4+32*x^3+19*x^2-15*x)/((x-1)*(2*x+1)*(2*x-1)*(2*x^2-1)) [From Maksym Voznyy (voznyy(AT)mail.ru), Jul 26 2009]

Sequence in context: A031053 A063130 A033954 this_sequence A081274 A038764 A132438

Adjacent sequences: A159224 A159225 A159226 this_sequence A159228 A159229 A159230

nonn

Ron Hardin (rhhardin(AT)att.net) Apr 06 2009