361251domain: NAppears in sequencesNonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+89)^2 = y^2.at n=15A129298a(n) = 5^n - ( (sqrt(5)*phi)^n + (sqrt(5)/phi)^n ) + 1, where phi = golden ratio A001622.at n=8A245561