6712571031domain: NAppears in sequencesReal part of (3 + 2i)^n.at n=19A121622List of coprime pairs (x,y) such that x^2+y^2 = 13^n with 0<x<y.at n=38A158936Values of x such that x^2 + y^2 = 13^n with x and y coprime and 0 < x < y.at n=19A188948Odd numbers y such that x^2 + y^2 = 13^n with x and y coprime.at n=19A188983