# A196868 (b-file synthesized from sequence entry) 0 1 1 6 2 -18 3 144 4 -1026 5 10368 6 -91044 7 995328 8 -9630090 9 109486080 10 -1120744188 11 13042778112 12 -138540597588 13 1637370298368 14 -17853248637000 15 213325958873088 16 -2371846639850586 17 28573129903177728 18 -322526246042905740 19 3910007249908531200 20 -44670671340291807228