a(n) = Sum_{k=0..n} binomial(n+k,k)^4.

A219562

a(n) = Sum_{k=0..n} binomial(n+k,k)^4.

Terms

    a(0) =1a(1) =17a(2) =1378a(3) =170257a(4) =25561876a(5) =4294835666a(6) =776487013506

External references