# A357191 (b-file synthesized from sequence entry) 0 1 1 0 2 2 3 6 4 216 5 2040 6 111240 7 2164680 8 159391680 9 5247305280 10 491431600800 11 24437592194400 12 2800955712804480 13 195393943295591040 14 26699221909806526080 15 2479967110139382864000 16 396503602252401676032000 17 47167550656581451928832000