13970880domain: NAppears in sequencesLah numbers: a(n) = n!*binomial(n-1,5)/6!.at n=5A001778a(1)=1, a(n) = Sum_{k=1..n-1} Fibonacci(k)*a(k).at n=9A082471(2*(n-1))! * (2*n-1)! / (n * (n-1)!^3).at n=5A248045Table read by rows. T(n, k) = n*((k + n)!)^2/((k + n)*(n!)^2*k!) for n > 0 and T(0, 0) = 1.at n=26A355005