G.f.: 16/(7 + 9*sqrt(1 - 32*x)).

A130980

G.f.: 16/(7 + 9*sqrt(1 - 32*x)).

Terms

    a(0) =1a(1) =9a(2) =153a(3) =3177a(4) =73017a(5) =1785609a(6) =45543897a(7) =1197639081a(8) =32231934585a(9) =883404542025

External references