# A202619 (b-file synthesized from sequence entry) 0 1 1 2 2 8 3 8 4 320 5 288 6 1920 7 17280 8 5806080 9 89600 10 87091200 11 17418240 12 1494484992000 13 402361344000 14 62768369664000 15 295206912 16 4097519171665920 17 342372925440000 18 256094948229120000 19 5377993912811520000 20 5573557327822848000000 21 89903156428800000 22 32371220959995101184000 23 73570956727261593600000