Column 0 of triangle A104560.

Terms

a(0) =1a(1) =-1a(2) =1a(3) =-2a(4) =6a(5) =-30a(6) =204a(7) =-1944a(8) =23340a(9) =-360060a(10) =6692280a(11) =-151908120a(12) =4032593040a(13) =-126425330640