a(n+1) = a(n)^2 + a(n) + 1.A002065a(n+1) = a(n)^2 + a(n) + 1.Terms a(0) =0a(1) =1a(2) =3a(3) =13a(4) =183a(5) =33673a(6) =1133904603External referencesoeis: A002065