a(n)=(-1)^n*(-2)^C(n,2)*A001045(n+1).

A186196

a(n)=(-1)^n*(-2)^C(n,2)*A001045(n+1).

Terms

    a(0) =1a(1) =-1a(2) =-6a(3) =40a(4) =704a(5) =-21504a(6) =-1409024a(7) =178257920a(8) =45902462976

External references