Column 1 of array in A188797.A188801Column 1 of array in A188797.Terms a(0) =-3a(1) =-18a(2) =513a(3) =33588a(4) =2808945a(5) =-41843142a(6) =-6519779667a(7) =-485174610648External referencesoeis: A188801