# A208655 (b-file synthesized from sequence entry) 1 1 2 1 3 6 4 36 5 2400 6 90000 7 55566000 8 13553164800 9 72267023646720 10 117595223746560000 11 5219033393851200000000 12 57636380373471744768000000 13 20810790197418148654769602560000 14 1578992018570629416640340512656998400