Number of non-commuting permutations: number of ordered pairs g, h in Symm(n) such that gh <> hg, i.e., the subgroup <g,h> is non-Abelian.

A086501

Number of non-commuting permutations: number of ordered pairs g, h in Symm(n) such that gh <> hg, i.e., the subgroup <g,h> is non-Abelian.

Terms

    a(0) =0a(1) =0a(2) =18a(3) =456a(4) =13560a(5) =510480a(6) =25326000a(7) =1624815360a(8) =131671008000

External references