# A193317 (b-file synthesized from sequence entry) 0 0 1 0 2 1 3 18 4 300 5 5550 6 117780 7 2873262 8 80126228 9 2534723280 10 90239747220 11 3588582531875 12 158318375911740 13 7700793136255440 14 410691133882551795 15 23894146232727414630 16 1509723335738373490800 17 103169903975944947302744 18 7597003720932150826636260 19 600748548233457344454385722