# A083789 (b-file synthesized from sequence entry) 1 1 2 2 3 6 4 9 5 12 6 28 7 30 8 1811 9 1976 10 8384 11 53760 12 243875 13 639336 14 41381633 15 102621357 16 7802708751 17 7802708752 18 178874468632 19 1133934949386