# A354328 (b-file synthesized from sequence entry) 0 1 1 0 2 1 3 6 4 70 5 1080 6 21162 7 501060 8 13904152 9 442241856 10 15855648120 11 632501646480 12 27781645311216 13 1332152096109120 14 69237728070951888 15 3876953348374273440 16 232666700169003442560 17 14897335773169370787840 18 1013656610215024983681408