8388638domain: NAppears in sequencesLeast integer m whose largest prime factor > m^(n/(n+1)).at n=21A063765Number of (n+1) X (4+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nonincreasing x(i,j)-x(i-1,j) in the j direction.at n=21A250738