a(n) = C(2*n+1,n)*C(2*n+6,n+1).

A113888

a(n) = C(2*n+1,n)*C(2*n+6,n+1).

Terms

    a(0) =6a(1) =84a(2) =1200a(3) =17325a(4) =252252a(5) =3699696a(6) =54609984a(7) =810616950a(8) =12092280200a(9) =181176906768

External references