a(n) = 64^n * Sum_{k=0..n} binomial(2*k,k)^3 / 64^k.

A167871

a(n) = 64^n * Sum_{k=0..n} binomial(2*k,k)^3 / 64^k.

Terms

    a(0) =1a(1) =72a(2) =4824a(3) =316736a(4) =20614104a(5) =1335305664a(6) =86248451520

External references