Binomial coefficient C(8n,n-2).

A004383

Binomial coefficient C(8n,n-2).

Terms

    a(0) =1a(1) =24a(2) =496a(3) =9880a(4) =194580a(5) =3819816a(6) =74974368a(7) =1473109704a(8) =28987537150a(9) =571350360240

External references