a(n) = Sum_{k=0..n} binomial(5*n,6*k).

A387850

a(n) = Sum_{k=0..n} binomial(5*n,6*k).

Terms

    a(0) =1a(1) =1a(2) =211a(3) =5461a(4) =164921a(5) =5858126a(6) =174174002a(7) =5791193143a(8) =182670807229

External references