# A202367 (b-file synthesized from sequence entry) 1 1 2 6 3 360 4 45360 5 5443200 6 359251200 7 5884534656000 8 35307207936000 9 144053408378880000 10 1034591578977116160000 11 3414152210624483328000000 12 471153005066178699264000000 13 15434972445968014187888640000000 14 92609834675808085127331840000000 15 161141112335906068121557401600000000