# A371068 (b-file synthesized from sequence entry) 0 1 1 1 2 0 3 0 4 24 5 360 6 2160 7 7560 8 241920 9 8164800 10 145756800 11 1736380800 12 34488115200 13 1416906691200 14 46117316044800 15 1085696644032000 16 26627911620710400 17 1054301997805056000 18 46867776416068608000 19 1726488804870679449600 20 58404671366139850752000