a(n) = (9*n)!*(5*n/2)!*(3*n/2)!/((5*n)!*(9*n/2)!*(3*n)!*(n/2)!).
A364174
a(n) = (9*n)!*(5*n/2)!*(3*n/2)!/((5*n)!*(9*n/2)!*(3*n)!*(n/2)!).
Terms
- a(0) =1a(1) =48a(2) =4862a(3) =549120a(4) =65132550a(5) =7945986048a(6) =987291797996
External references
- oeis: A364174