# A250071 (b-file synthesized from sequence entry) 1 1 2 6 3 72 4 120 5 5184 6 1440 7 373248 8 6720 9 28800 10 103680 11 1934917632 12 80640 13 278628139008 14 7464960 15 2073600 16 483840 17 1444408272617472 18 1612800 19 103997395628457984 20 5806080 21 298598400 22 77396705280 23 539122498937926189056 24 7096320 25 1658880000 26 5572562780160 27 90316800 28 418037760 29 402452788967166148425547776 30 116121600