# A210627 (b-file synthesized from sequence entry) 3 72 4 896 5 14400 6 283392 7 6598144 8 177373184 9 5406289920 10 184223744000 11 6939874934784 12 286375842938880 13 12846564299505664 14 622448445155704832 15 32395710363284275200 16 1802446793652649852928 17 106760825994912064339968 18 6707088257932303257305088 19 445456559121345605093294080 20 31185504805980142781333504000