# A058872 (b-file synthesized from sequence entry) 1 0 2 2 3 12 4 80 5 720 6 9152 7 165312 8 4244480 9 154732800 10 8005686272 11 587435092992 12 61116916981760 13 9011561121239040 14 1882834327457349632 15 557257804202631217152 16 233610656002563147038720 17 138681207656726645785559040 18 116575238610106596799428165632