# A360283 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 18 4 288 5 1200 6 43200 7 529200 8 11289600 9 91445760 10 9144576000 11 92207808000 12 13277924352000 13 160283515392000 14 2094371267788800 15 58904191906560000 16 15079473128079360000 17 242109318556385280000 18 78443419212268830720000 19 1415903716781452394496000