173059286400domain: NAppears in sequencesa(n) = (n-1)!*binomial(3*n,n)/(3*(2*n+1)).at n=8A076151Product of 8 consecutive integers. a(n) = RisingFactorial(n, 8).at n=22A239035a(n) = (n + A332558(n))!/(n-1)!.at n=21A332560a(n) = Product_{k=0..n-1} (3*n+k-2).at n=8A384262