1066185domain: NAppears in sequencesa(n) = (n+1)*(2*n+1)*(3*n+1)*(4*n+1).at n=14A011245Triangle T(n,k) represents the coefficients of (x^15*d/dx)^n, where n=1,2,3,...; generalization of Stirling numbers of second kind A008277, Lah-numbers A008297.at n=10A223517a(n) = n*(n + 7)*(n + 14)*(n + 21)*(n + 28)/120.at n=29A264449