# A055070 (b-file synthesized from sequence entry) 1 0 2 0 3 9 4 80 5 900 6 12348 7 200704 8 3779136 9 81000000 10 1948717100 11 52027785216 12 1527047909712 13 48884036690944 14 1695352148437500 15 63331869759897600 16 2535571976423919872 17 108321063231221415936 18 4918685157679434648876