# A225116 (b-file synthesized from sequence entry) 0 1 1 5 2 24 3 110 4 480 5 2000 6 8064 7 32240 8 130560 9 531200 10 2095104 11 8030720 12 33546240 13 156569600 14 536838144 15 243660800 16 8589803520 17 244224819200 18 137438429184 19 -28539130347520 20 2199021158400 21 4960294141952000 22 35184363700224 23 -1015283149035274240 24 562949919866880