452329200domain: NAppears in sequencesStirling numbers of second kind S2(20,n).at n=14A011569Sixth diagonal of the Stirling2 triangle A048993 and sixth column of triangle A008278.at n=14A112494a(n) = [x^n] Product_{k=1..3*n} 1/(1 - k*x).at n=5A383881