a(n) = A369134(n, 2).

Terms

a(0) =0a(1) =0a(2) =-1a(3) =7a(4) =-14a(5) =693a(6) =-30030a(7) =4150146a(8) =-21441420a(9) =3508377873a(10) =-425496301230