# A242484 (b-file synthesized from sequence entry) 1 1 2 2 3 24 4 4320 5 4680 6 26208 7 8910720 8 17428320 9 20427264 10 91963648 11 197064960 12 8583644160 13 10200236032 14 21857648640 15 57575890944 16 57629644800 17 206166804480 18 17116004505600 19 1416963251404800 20 15338300494970880