a(n) = Sum_{k=0..n} A128899(n,k)^3.

A382394

a(n) = Sum_{k=0..n} A128899(n,k)^3.

Terms

    a(0) =1a(1) =1a(2) =9a(3) =190a(4) =5705a(5) =204876a(6) =8209278a(7) =354331692a(8) =16140234825a(9) =765868074400

External references