# A053518 (b-file synthesized from sequence entry) 0 1 1 5 2 23 3 45 4 925 5 7285 6 7195 7 641075 8 6993545 9 27779915 10 1077005935 11 15001154095 12 6788401045 13 3570274674605 14 60484653310955 15 40198648188145 16 1869525647793155 17 31559031031400605 18 2865359642850975565