2465133864

Appears in sequences

• Smallest leg in right triangle with relatively prime sides and hypotenuse 5^n.at n=13A036842
• a(n) = 5^n*sin(2n*arctan(1/2)) or numerator of tan(2n*arctan(1/2)).at n=13A066770
• Expansion of 1/(1 - 4*x + 5*x^2).at n=27A099456
• Imaginary part of (4 + 3i)^n.at n=13A139031
• Values of x such that x^2 + y^2 = 5^n with x and y coprime and 0 < x < y.at n=27A230710