242017776domain: NAppears in sequencesImaginary part of (1+2i)^n.at n=24A006496Largest leg in right triangle with relatively prime sides and hypotenuse 5^n.at n=11A067312Imaginary part of (4 + 3i)^n.at n=11A139031Values of y such that x^2 + y^2 = 5^n with x and y coprime and 0 < x < y.at n=23A230711