Column 0 of triangle A132690.

Terms

a(0) =1a(1) =1a(2) =-1a(3) =5a(4) =-43a(5) =527a(6) =-8396a(7) =164672a(8) =-3835910a(9) =103464895a(10) =-3170985454a(11) =108828369497