# A344019 (b-file synthesized from sequence entry) 4 24 5 12 6 120 7 240 8 1440 9 10080 10 80640 11 725760 12 7257600 13 79833600 14 958003200 15 12454041600 16 174356582400 17 2615348736000 18 41845579776000 19 711374856192000 20 12804747411456000 21 243290200817664000 22 4865804016353280000 23 102181884343418880000 24 2248001455555215360000 25 51704033477769953280000 26 1240896803466478878720000