a(n) = (A001147(n))^3 = 2^(3*n)*Gamma(n+1/2)^3/Pi^(3/2).

A166750

a(n) = (A001147(n))^3 = 2^(3*n)*Gamma(n+1/2)^3/Pi^(3/2).

Terms

    a(0) =1a(1) =1a(2) =27a(3) =3375a(4) =1157625a(5) =843908625

External references