a(n) = Sum_{k = 0..n} C(n,k)^5.

A005261

a(n) = Sum_{k = 0..n} C(n,k)^5.

Terms

    a(0) =1a(1) =2a(2) =34a(3) =488a(4) =9826a(5) =206252a(6) =4734304a(7) =113245568a(8) =2816649826a(9) =72001228052

External references