# A356323 (b-file synthesized from sequence entry) 1 1 2 11 3 89 4 794 5 6994 6 72204 7 753108 8 8973264 9 111281616 10 1524322080 11 21601104480 12 340803192960 13 5483287025280 14 96044874750720 15 1748238132614400 16 34093033838438400 17 682396164763084800 18 14706429413353574400 19 323342442475011993600 20 7585740483060676608000