# A323992 (b-file synthesized from sequence entry) 1 13440 2 604800 3 3642240 4 20818560 5 44029440 6 163900800 7 229850880 8 677980800 9 895238400 10 1981324800 11 2184053760 12 5641829760 13 5017447680 14 10343289600 15 11931978240 16 21789747840 17 19152806400 18 40285728000 19 33366117120 20 68201602560 21 62289588480 22 98282419200 23 86675097600 24 183732796800