Binomial coefficient C(5n,n-7).

A004349

Binomial coefficient C(5n,n-7).

Terms

    a(0) =1a(1) =40a(2) =990a(3) =19600a(4) =341055a(5) =5461512a(6) =82598880a(7) =1198774720a(8) =16871053725a(9) =231900297200

External references