a(n) = (6*n)!*(5*n)!*(2*n)! / ((4*n)!^2 * (3*n)! * n!^2).
A364511
a(n) = (6*n)!*(5*n)!*(2*n)! / ((4*n)!^2 * (3*n)! * n!^2).
Terms
- a(0) =1a(1) =50a(2) =8910a(3) =2011100a(4) =503909070a(5) =133954543800
External references
- oeis: A364511
A364511
a(n) = (6*n)!*(5*n)!*(2*n)! / ((4*n)!^2 * (3*n)! * n!^2).