# A058833 (b-file synthesized from sequence entry) 0 0 1 0 2 0 3 3 4 0 5 30 6 360 7 6930 8 196728 9 8115660 10 433362960 11 28552545945 12 2276033387760 13 216132739612218 14 24118774853584320 15 3125242929676107240 16 465357404934002231280 17 78908446775174591638440