1822101domain: NAppears in sequencesa(n) = n^4 - n^3 - n^2 - n - 1.at n=37A125082Number of (3+1) X (n+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.at n=23A250815