# A372145 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 12 4 48 5 288 6 2304 7 26880 8 430080 9 10035200 10 321126400 11 14836039680 12 949506539520 13 87734404251648 14 11230003744210944 15 2064716402685640704 16 528567399087524020224 17 194361783607326689722368 18 99513233206951265137852416 19 72958995691997968023051829248 20 74710011588605919255605073149952