a(n) = Sum_{k=0..n} binomial(4*n,6*k).

A387849

a(n) = Sum_{k=0..n} binomial(4*n,6*k).

Terms

    a(0) =1a(1) =1a(2) =29a(3) =926a(4) =9829a(5) =164921a(6) =2973350a(7) =43942081a(8) =708653429a(9) =11582386286a(10) =182670807229

External references