Sum of squares of alternating factorials : n!^2 - (n-1)!^2 + (n-2)!^2 - ... 1!^2.

A092170

Sum of squares of alternating factorials : n!^2 - (n-1)!^2 + (n-2)!^2 - ... 1!^2.

Terms

    a(0) =1a(1) =3a(2) =33a(3) =543a(4) =13857a(5) =504543a(6) =24897057a(7) =1600805343a(8) =130081089057

External references