a(n) = 9979200 * (4*n)!/(n!*(n+3)!^3).

A361035

a(n) = 9979200 * (4*n)!/(n!*(n+3)!^3).

Terms

    a(0) =46200a(1) =17325a(2) =116424a(3) =2134440a(4) =67953600a(5) =3086579925a(6) =179961581800

External references