# A152456 (b-file synthesized from sequence entry) 0 -3 1 -1 2 6 3 54 4 408 5 3240 6 28080 7 267120 8 2782080 9 31570560 10 388281600 11 5149267200 12 73287244800 13 1114636723200 14 18045906278400 15 309918825216000 16 5628230479872000 17 107773290713088000 18 2170404686241792000