9235919domain: NAppears in sequencesLeast k such that n*(k^2)+n*k+1 is a square, or 0 if n is a square.at n=69A103844Numbers such that 71*(a(n)^2) + 71*a(n) + 1 is a square.at n=2A105175Least k such that prime(n)*(k^2) + prime(n)*k + 1 = m^2 = a square.at n=19A105263