Binomial coefficient C(7n,n-3).

A004371

Binomial coefficient C(7n,n-3).

Terms

    a(0) =1a(1) =28a(2) =595a(3) =11480a(4) =211876a(5) =3819816a(6) =67945521a(7) =1198774720a(8) =21042072975a(9) =368136785016

External references