5583548873

Appears in sequences

• Real part of (1 + 2*i)^n, where i is sqrt(-1).at n=28A006495
• a(n) = 5^n*cos(2*n*arctan(1/2)) or denominator of tan(2*n*arctan(1/2)).at n=14A066771
• Largest leg in right triangle with relatively prime sides and hypotenuse 5^n.at n=13A067312
• Real part of (2 + i)^n, where i = sqrt(-1).at n=28A139011
• Values of y such that x^2 + y^2 = 5^n with x and y coprime and 0 < x < y.at n=27A230711