71674domain: NAppears in sequencesa(n) = 625n^2 - 364n + 53.at n=10A157621Number of (n+1) X (6+1) 0..1 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=10A250654Numbers k such that the equation x^2 - k*y^4 = -1 has a solution for which |y| > 2.at n=31A356488