# A332960 (b-file synthesized from sequence entry) 1 0 2 12 3 180 4 5040 5 151200 6 6029100 7 276215940 8 14983768800 9 919653134400 10 63694663332300 11 4888759865289300 12 412920835111184400 13 38015644799992860000 14 3791220682538296507500 15 407033985027273005902500 16 46814497435454120812440000 17 5742194963898519585098640000 18 748255970051952172869045487500