Column 1 of triangle A132690.

Terms

a(0) =1a(1) =1a(2) =-2a(3) =12a(4) =-118a(5) =1605a(6) =-27816a(7) =585046a(8) =-14459138a(9) =410368743a(10) =-13146830110a(11) =469123986529