a(n) = Sum_{k=0..n} binomial(5*n,5*k).

A070782

a(n) = Sum_{k=0..n} binomial(5*n,5*k).

Terms

    a(0) =1a(1) =2a(2) =254a(3) =6008a(4) =215766a(5) =6643782a(6) =215492564a(7) =6863694378a(8) =219993856006

External references