6421422150

Appears in sequences

• a(n) = (1/n!) * (5*n)!/(5*n/2)! * (3*n/2)!/(3*n)!.at n=8A262732
• a(n) = (3*n)!*(10*n)!/((2*n)!*(5*n)!*(6*n)!).at n=4A364402