0,2

G.f.: (1+2*x+x^2-x^3)/(1-2*x^2-6*x^3-3*x^4+2*x^5+x^6).

(PARI) {a(n)=polcoeff((1+2*x+x^2-x^3)/(1-2*x^2-6*x^3-3*x^4+2*x^5+x^6)+x*O(x^n), n)}

Cf. A099604, A099605, A034870.

Sequence in context: A001004 A015951 A101531 this_sequence A077550 A056780 A111360

Adjacent sequences: A099604 A099605 A099606 this_sequence A099608 A099609 A099610

nonn

Paul D. Hanna (pauldhanna(AT)juno.com), Oct 25 2004