# A363983 (b-file synthesized from sequence entry) 0 1 1 2 2 14 3 128 4 1310 5 14252 6 161168 7 1872096 8 22179102 9 266766500 10 3247293764 11 39914850560 12 494587904720 13 6170138404640 14 77420709800000 15 976308769560128 16 12365391374849310 17 157214288994620820 18 2005631418267291740