0,3

O.g.f.: 1/(x^2+2*x-1)-1/(3*x-1). a(n)= 3^n-A000129(n+1). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 17 2008

Cf. A132894.

Adjacent sequences: A137210 A137211 A137212 this_sequence A137214 A137215 A137216

Sequence in context: A005492 A003013 A117202 this_sequence A027853 A132894 A117917

nonn

Paul Curtz (bpcrtz(AT)free.fr), Mar 06 2008

More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 17 2008