# A052570 (b-file synthesized from sequence entry) 0 0 1 1 2 8 3 96 4 1536 5 30720 6 737280 7 20643840 8 660602880 9 23781703680 10 951268147200 11 41855798476800 12 2009078326886400 13 104472072998092800 14 5850436087893196800 15 351026165273591808000 16 22465674577509875712000