# A155671 (b-file synthesized from sequence entry) 0 1 1 2 2 20 3 272 4 3440 5 40952 6 468560 7 5217032 8 56953280 9 612579512 10 6513215600 11 68618940392 12 717570463520 13 7458134171672 14 77123207545040 15 794108867905352 16 8146979811148160 17 83322818300333432 18 849905364703000880