# A127295 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 6 4 30 5 1260 6 1680 7 19825740 8 10028280 9 182416547040 10 271239404020200 11 219240769050559711332360 12 6467876945923041743744426827092900 13 27867228909478820644943875389480