# A013164 (b-file synthesized from sequence entry) 0 1 1 0 2 4 3 -6 4 51 5 -180 6 1710 7 -9450 8 105525 9 -793800 10 10319400 11 -98232750 12 1463667975 13 -16856739900 14 283755121650 15 -3834908327250 16 72041492147625 17 -1117601855370000 18 23190238498927500 19 -406108574195073750