a(n) = (4*n-1)! / (n! * n! * n! * (n-1)! * 3!).
A082368
a(n) = (4*n-1)! / (n! * n! * n! * (n-1)! * 3!).
Terms
- a(0) =1a(1) =105a(2) =15400a(3) =2627625a(4) =488864376a(5) =96197645544
External references
- oeis: A082368
A082368
a(n) = (4*n-1)! / (n! * n! * n! * (n-1)! * 3!).