43994domain: NAppears in sequencesExpansion of Product_{k>=1} (1 + A001055(k)*x^k).at n=47A066816Numbers n such that Lucas(prime(n)) is prime, where Lucas = A000032.at n=51A120561Number of free polyominoes with n cells with at most 4 collinear cell centers on any line in the plane.at n=12A380990